Malicious PDF — malware analysis report

Static analysis result for SHA-256 1916aec5edfd09b0…

MALICIOUS

PDF

42.6 KB Created: 2020-08-03 15:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5d4ac32f915c3cde2482e3340bb04ec1 SHA-1: 4c7b263a3920abf613e05b25d5d80f4166b92b75 SHA-256: 1916aec5edfd09b034745419f19fd14198a05df44cbac7ee1ab6bdabb72441c3
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is disguised as a home loan application form. The document body also contains this URL and numerous other links hosted on Shopify, likely part of a link farm to improve search engine ranking for malicious content. The presence of a callback lure suggests a phishing or scam attempt.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.ru/pify?keyword=allahabad+bank+home+loan+application+form+pdf In PDF document text
    • http://files.ohiochessacademy.com/uploads/1/3/0/9/130969801/tuwikezunonudovogi.pdfIn PDF document text
    • http://files.kinderdancemetrostl.com/uploads/1/3/2/3/132302759/linarufivijidi.pdfIn PDF document text
    • http://files.victoriavisions.com/uploads/1/3/1/4/131438616/5484131.pdfIn PDF document text
    • http://files.aprautobodys.com/uploads/1/3/1/4/131453084/nivumowalikuxim_fesatux_gaxiverib.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/1/0432/0532/9064/files/vitovo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0517/4183/files/vujinefop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/varanomavumozomadeda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/pawajur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/62318153297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/38444386834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2127/9137/files/xorejefenitowegagot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/vurilimozogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/rufegasir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/58276645578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/16943139773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2793/1029/files/ximesemeduz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/bimimisixa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E07 5408 bytes
SHA-256: ce8ec075fd0c23544324ba462eb7eee51d94de9767b2d76a3bfeeef247b92308
font_01_sfnt_off00007039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7039 2092 bytes
SHA-256: 13678a14b930e6d42e11b2ac41b13981c2c7f5938cc30cfb194ad51886f1f1dd
font_02_sfnt_off000079de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79DE 10148 bytes
SHA-256: fabe1eddced10f8c14e2933b75d762ee82cabae642176327643fbdf358283aae