Malicious PDF — malware analysis report

Static analysis result for SHA-256 28baffd1f816f93f…

MALICIOUS

PDF

46.2 KB Created: 2020-08-20 07:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b772ef25ef287c5182acc372ed4d4cac SHA-1: a42ed37201229d2b91e8fa047198071cc846fc39 SHA-256: 28baffd1f816f93fd0209064d6375c2b5fc730b060e54a701d969c93caacd77c
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=antivirus+for+windows+7+filehippo'. This URL is presented as a lure for 'antivirus for windows 7 filehippo', suggesting a social engineering tactic to trick users into downloading or visiting a malicious site. The PDF also contains a large number of external links, many of which are hosted on Shopify, but the primary malicious indicator is the redirector.

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.
  • 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.
  • 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=antivirus+for+windows+7+filehippo In PDF document text
    • http://files.longheathchurch.org/uploads/1/3/1/4/131437576/3649276.pdfIn PDF document text
    • http://wubiv.alexandriatalley.com/uploads/1/3/0/7/130775565/tejexexetanonot_lomudi_lobokojoxo_vatexiwes.pdfIn PDF document text
    • http://files.rbsm.me.uk/uploads/1/3/0/7/130776072/fapomomewa_dagavu_rolixinazusos_ziresono.pdfIn PDF document text
    • http://files.miembros-soylacasa.com/uploads/1/3/1/1/131163833/205c923758a.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/1/0428/7932/0223/files/qed_beauty_in_mathematical_proof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4863/8363/files/74672465860.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/blank_instagram_template_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1791/8875/files/idke_osu_skin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4302/0183/files/best_annotation_ipad_apple_pencil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2363/8426/files/tesivojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5987/9834/files/el_camino_del_guerrero_resumen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8446/3784/files/ribewejokafolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6592/3992/files/dawufe.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_off00007621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7621 5140 bytes
SHA-256: b3017d439293476b2467cf8fff423255773f240faf816206059291da5135333b
font_01_sfnt_off000087b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B7 10704 bytes
SHA-256: 1b0e72e4b976e1851287f0f40ed62343098f6b88a844484e7380add579318798

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