Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1b9aa4a0a369c1a…

MALICIOUS

PDF

69.2 KB Created: 2020-08-26 05:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cf47a80119a8829f3d7a88dcf0ab0bbb SHA-1: 9f3261bfb1ecdd689421c8acca25dfec3c51c099 SHA-256: a1b9aa4a0a369c1aecb131dd8babfefa21b59fdf41d00ca46e7c8c7be87826ed
194 Risk Score

Malware Insights

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

The PDF contains a link disguised as a government payment status report, which redirects to a malicious infrastructure. The PDF also contains a large number of links to other PDFs hosted on Shopify, likely as part of an SEO link farm to obscure the malicious redirector. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=ysrrythubarosa+gov+rbapp+reports+payment+status In PDF document text
    • http://dofibitab.southactorsguide.com/uploads/1/3/0/8/130873995/3568445.pdfIn PDF document text
    • http://fopoju.flowersfromsarahsgarden.com/uploads/1/3/0/7/130739892/vopemuvofe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9581/0455/files/welorubemodeva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/besulo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4349/4815/files/ceragon_ip_10_commissioning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/graphene_optical_properties.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/2911/1455/files/17936887785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6189/3533/files/enhancement_shaman_pvp_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8311/2341/files/abba_happy_new_year_piano_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2853/6734/files/87775334304.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F22 5464 bytes
SHA-256: 33fe9347934a7b702044fccec5c4540ad7967176b1dd94488204aff9b2bf1d89
font_01_sfnt_off0000819e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x819E 32248 bytes
SHA-256: c9f2b0a7fe7c9874960658a67c604b1609ef31f451f9afaf6ac6894b78387137
font_02_sfnt_off0000c456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC456 10080 bytes
SHA-256: 852fa33cbf858e79f79c7176a7e8ccdf49cfdaa447a847ad786595812eaf729b
font_03_sfnt_off0000e708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE708 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3
font_04_sfnt_off0000fc59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC59 2568 bytes
SHA-256: 413cae8dc8a887cac241d3de3758f3f3dc95ed0159125f697a1688b886dc5ab7

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