Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a353fd17db41538…

MALICIOUS

PDF

36.7 KB Created: 2020-08-11 17:17:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aa4a524eadb79f81c6d4ac2a44599781 SHA-1: 6725c63a13aee6bc5f7dbbae78e81b124005352b SHA-256: 8a353fd17db4153829a0dd24222b8daf9d44373b54ae3951c31cf69543bc70c9
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body text, though heavily obfuscated, contains the same lure text as the malicious URL, suggesting a social engineering attempt to trick users into downloading a malicious file. The presence of a visual download button further supports this. The primary malicious IOC is the redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=fybsc+it+imperative+programming+pdf In PDF document text
    • http://files.gradeseven.nestmusic.org/uploads/1/3/0/7/130775561/8575453.pdfIn PDF document text
    • http://kimatebak.bhi5.com/uploads/1/3/1/4/131408738/3796223.pdfIn PDF document text
    • http://virape.transinthecity.co.uk/uploads/1/3/0/7/130740044/8939505.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9747/3699/files/xuvuwove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6974/2999/files/55843603846.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7644/2519/files/33233283171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/getepakumalomikumarofot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0816/2974/files/pojeberixiwavimagiligu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0229/8521/files/lidetoguvebemekijowakox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2650/5128/files/uk_tier_4_visa_application_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/activate_a2_student_s_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8198/2361/files/duwam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0455/6845/8917/files/billetes_didacticos_mexicanos_para_imprimir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0722/0635/files/haggadah_text_english.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 4

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_off00004f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F9D 5700 bytes
SHA-256: 3bfd97b19b2128df9bda452632429eeb8c9083b3676bf85aa0aa277e18696220
font_01_sfnt_off000062ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62ED 10256 bytes
SHA-256: 3ac3e79e178349264c266f6e847f7826f8660a2bae2261661ca3be400474ac6e

Open this report in the interactive analyzer, or submit your own file for analysis.