Malicious PDF — malware analysis report

Static analysis result for SHA-256 a178c50edc6d5bad…

MALICIOUS

PDF

41.3 KB Created: 2020-08-06 14:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e8791b5797031687f64e9c9107c5eacd SHA-1: ac86167237ddf9a0a17cbe4365d60a274145e634 SHA-256: a178c50edc6d5bad0abdb45efc79dd493e48429c96727b9ff1237521e823d41a
202 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify-hosted PDFs, suggesting a link farm for SEO manipulation or to obscure malicious destinations. One URL, 'https://ttraff.cc/pify?keyword=basic+electrical+engineering+short+notes+pdf', is identified as a malicious redirector. The presence of a 'download button' heuristic further supports a lure-based attack. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

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=basic+electrical+engineering+short+notes+pdf In PDF document text
    • http://files.pemmensgolf.net/uploads/1/3/1/3/131379612/febokibilodirina.pdfIn PDF document text
    • http://files.colettejonopulos.com/uploads/1/3/1/4/131483138/755b9dfc8.pdfIn PDF document text
    • http://files.susanedwardsartwork.com/uploads/1/3/1/0/131069978/6351905.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/1/0435/8746/9469/files/kaporadijonala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/sewotaderajizik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1461/8262/files/sowevopupawosesunifivavo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8558/6841/files/piladumosoxasapisenegege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7338/6136/files/jquery_resizing_image.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5498/9466/files/75993510265.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2566/0066/files/44414661265.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2303/1720/files/wufugot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lujodegiduwidixerilaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/bullying_in_the_workplace_south_africa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8333/3786/files/89369284229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6023/8238/files/37199478944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6856/9238/files/albinism_disease.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0684/4315/files/surirapixavetoxowefed.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6161 5468 bytes
SHA-256: 732cbebb588f2d4c8ba3a25b684f6879ec854489fa7c54d0cb6972af604f3498
font_01_sfnt_off000073f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73F0 10604 bytes
SHA-256: 0d259e9923e0857f62ced76e25b5359f8a3bab9c4f710110ccef57d1abc73a78