Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cfd332f4a94f997…

MALICIOUS

PDF

55.4 KB Created: 2020-08-06 19:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b250702fe798ba31e0189ad081990a02 SHA-1: 6303a04b475b32fe8dd09b996e21ef9f428b2e7a SHA-256: 5cfd332f4a94f99782a66641b44554980a7094881d7380506fc91cc51e5e2722
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to redirector services like 'ttraff.cc', which is flagged as malicious. The document body, though heavily obfuscated, contains URLs that suggest a lure for downloading a file, possibly related to an 'FCI assistant grade 3 advertisement'. The presence of multiple external PDF links and a malicious redirector indicates a phishing or content-luring campaign.

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=fci+assistant+grade+3+advertisement+pdf In PDF document text
    • http://files.cymru.tycymorth.org.uk/uploads/1/3/0/7/130775080/kapijibedimisojefuk.pdfIn PDF document text
    • http://gatil.henhouseart.co.uk/uploads/1/3/0/9/130969045/8720791.pdfIn PDF document text
    • http://files.maria-cipriano.com/uploads/1/3/2/6/132683000/samowu.pdfIn PDF document text
    • http://files.callanjames.co.nz/uploads/1/3/1/3/131398000/ranurupowalos.pdfIn PDF document text
    • http://files.septicserviceshunstville.com/uploads/1/3/2/6/132682655/duvizukujalufon.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/1/0432/8305/4757/files/vagupiwar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gigogew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1814/1347/files/40715070878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9612/8153/files/15814471308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7683/7785/files/8408024913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0948/1624/files/zamobefavatofep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6881/6544/files/django_array_field.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4413/3281/files/36170969254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8001/5262/files/95338504120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4571/5109/files/lusevarasututuvelise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/bowflex_manuals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9066/3832/files/85570783884.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6729 5620 bytes
SHA-256: ba37bc3d076a96ca9de3fa42526e8005938a1e9fd5c596f969d79ad17fd346da
font_01_sfnt_off00007a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3A 5684 bytes
SHA-256: ba3d498fb0265f06a5e059d6578b2446085df1d7fc6bf2db694160321929a8d7
font_02_sfnt_off000089dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89DC 14788 bytes
SHA-256: d2608dc11ac8086760e283e9c79d3148251d362786438c911dc05ccfea8f4000
font_03_sfnt_off0000b7f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7F4 16728 bytes
SHA-256: 85a233df2680af02f43e683b55ab6dfc19001444a59be515fc53efc100138496