Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6d0e8f39e11614…

MALICIOUS

PDF

39.1 KB Created: 2020-08-21 18:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5781bbb469504beec773b82efa08f701 SHA-1: d4e1863d9ebbdf30fdd4804ee29f4467e82b0f50 SHA-256: 3c6d0e8f39e11614e6eb984c71c1a0807b99311348fc488661ff4de82bbf7cc1
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external links. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=letter+format+for+experience+certificate+in+malayalam', which is likely used to direct users to malicious content. The document body, though partially corrupted, also contains this URL and other PDF links, suggesting a link farm or redirection scheme to distribute further payloads.

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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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=letter+format+for+experience+certificate+in+malayalam In PDF document text
    • http://files.lianajoychristensen.com/uploads/1/3/1/1/131164479/2525027.pdfIn PDF document text
    • http://files.anrs.ca/uploads/1/3/2/6/132695278/7936766.pdfIn PDF document text
    • http://zivove.stopmassincarceration.org/uploads/1/3/1/8/131871699/nexaretagozugo-jaranewapuwo.pdfIn PDF document text
    • http://files.carcbehindthewingz.com/uploads/1/3/0/7/130738559/jirezawefarut.pdfIn PDF document text
    • http://files.virgoapothecary.com/uploads/1/3/0/7/130738928/4aba63c6d8d066.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/1/0428/7542/0835/files/88060234800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/laxefasigapabaxirasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/tilamed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8414/3010/files/the_devil_wears_prada_watch_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0983/3117/files/riteroxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4189/0209/files/private_video_from_facebook_chrome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/1408/7846/files/56910565556.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 5

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_off00005a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A7A 5092 bytes
SHA-256: 8998ae71566fa3df699db6739455937dbc0e082aee6f7fdcb87d76257128289f
font_01_sfnt_off00006bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC4 10504 bytes
SHA-256: e550d3e86543674b8dd2878e56ad5399757a8af7ef6d9b039915b263757d2578

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