Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e77e214f3597ca7…

MALICIOUS

PDF

133.1 KB Created: 2020-10-16 08:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 590aa6baa549ce4ef6dfafb58d94eea3 SHA-1: 864d31b31c5968ab3206c35840c905025f6d0485 SHA-256: 7e77e214f3597ca773fac403630b7c74b7903b7840acc44be4bce9d089b17b81
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the document's structure and embedded links suggest it is designed to lure users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=cara+setting+l+speed+di+android In PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/ff06dfdf.pdfIn PDF document text
    • https://zeginuvo.weebly.com/uploads/1/3/0/7/130775519/kobajazidewulu.pdfIn PDF document text
    • https://fanavepuru.weebly.com/uploads/1/3/1/8/131871984/disejeluta.pdfIn PDF document text
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/79aca56bdf.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/jogowezokuvaxu.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/fesixukorupu.pdfIn PDF document text
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/1648062.pdfIn PDF document text
    • https://tidoxanarapora.weebly.com/uploads/1/3/2/7/132710787/xekonejekewewo.pdfIn PDF document text
    • https://zisokilusativ.weebly.com/uploads/1/3/2/3/132303079/4319572.pdfIn PDF document text
    • https://jowodetuleguzu.weebly.com/uploads/1/3/1/8/131856173/58dce66.pdfIn PDF document text
    • https://pibazafefudo.weebly.com/uploads/1/3/0/7/130776509/9e502cc275bc.pdfIn PDF document text
    • https://jowodetuleguzu.weebly.com/uploads/1/3/1/8/131856173/fudunivulepoxozug.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/kuzataro-dulode-saniti.pdfIn PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/1524106.pdfIn PDF document text
    • https://fofumizuzel.weebly.com/uploads/1/3/2/7/132740209/7640868.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c683698-2659-42db-b986-8c6909578569/jizivugimomexumufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1744d093-6bd1-448d-9395-19123227a99c/sikud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9118/2243/files/76993537258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0695/1061/files/63529939000.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A734 5032 bytes
SHA-256: ebcf009b15f8c12cb17dbfd0f01e7a1a775b51e6257795df29f649ddb7ed7396
font_01_sfnt_off0001b860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B860 16848 bytes
SHA-256: dba1b5cfa0de946a9f67b6a968b28f62ee065c2f3bc451979c59010f5efb307f
font_02_sfnt_off0001ec94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EC94 17352 bytes
SHA-256: 7d0d4e5bb568c3dd20decb02da0130e850e77f40a62c647c6cdf3b6954fba7b1