Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c2e3e86539356d3…

MALICIOUS

PDF

36.7 KB Created: 2020-07-09 04:47:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 1857d27c1f56ffb90e93d7880909b14c SHA-1: a86ff7a6d72fbff6fbecbb29ae3f620a5bb66095 SHA-256: 4c2e3e86539356d32711551e8acab048d4842a1e84cf5fea5273bad1b2f99c6d
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm designed for SEO manipulation. One prominent link redirects to `https://ttraff.com/wb?keyword=libro%20completo%20de%20reiki%20pdf%20gratis`, which is identified as a malicious redirector. The document body, though heavily obfuscated, contains similar URLs, suggesting a coordinated effort to drive traffic to malicious sites under the guise of providing free PDF content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.com/wb?keyword=libro%20completo%20de%20reiki%20pdf%20gratis In PDF document text
    • http://files.ejacts.com/uploads/1/3/1/3/131384018/givebivusunilujogoj.pdfIn PDF document text
    • http://files.foto4funphotography.com/uploads/1/3/0/8/130814337/guxubapomevi.pdfIn PDF document text
    • http://files.jlhopewindsofpoetry.com/uploads/1/3/1/0/131070035/1471895.pdfIn PDF document text
    • http://files.lizzieslowe.com/uploads/1/3/0/9/130969298/9d8f9a6deca.pdfIn PDF document text
    • http://files.uprisingstarsinc.org/uploads/1/3/1/3/131379045/gowofikur.pdfIn PDF document text
    • http://files.wvkuhl.com/uploads/1/3/2/8/132815960/vawivo-jajikoxak-putipitovuje.pdfIn PDF document text
    • http://files.novaqueue.com/uploads/1/3/2/6/132696280/xadowozaludujamozi.pdfIn PDF document text
    • http://files.lochgoin.com/uploads/1/3/1/6/131607239/gutexal.pdfIn PDF document text
    • http://files.timetraitor.com/uploads/1/3/1/4/131483006/8230976.pdfIn PDF document text
    • http://files.thepleasureseekersmarket.com/uploads/1/3/2/6/132695361/7781322.pdfIn PDF document text
    • http://files.blingiseverything.com/uploads/1/3/1/3/131384279/9733948.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fusikazisome.files.wordpress.com/2020/06/xemafilobegotunejop.pdfIn PDF document text
    • https://mewazaxudo.files.wordpress.com/2020/06/84880479818.pdfIn PDF document text
    • https://biwogawafa.files.wordpress.com/2020/07/24134321659.pdfIn PDF document text
    • https://buxutesop.files.wordpress.com/2020/06/50276936386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68905528383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ropuxikasafomudixaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/befuxaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40169505762.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5102 5300 bytes
SHA-256: 71f0d26ccc6a333dbc7ef7309e199d41bf084b9591fa61129f30ca62e2b58550
font_01_sfnt_off00006303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6303 9832 bytes
SHA-256: faf53cce3e46ba3b0b253c0ff58ad47221d36fa854009ca5f99f4469c33c5640

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