Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b1d312f74aabd4…

MALICIOUS

PDF

42.9 KB Created: 2020-09-06 00:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9af1f401b76d2007328342e4128e9857 SHA-1: 97b56fdee071380baf8d04106a2ac9737c276a4c SHA-256: 93b1d312f74aabd4dc63bd985066281357ebd588ff0dad13f9b733931f4ee1cd
202 Risk Score

Malware Insights

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

The PDF file contains a lure for 'free food' and embeds a link to a known malicious redirector. It also exhibits characteristics of a link farm, with numerous embedded URLs pointing to static.usrfiles.com. The document body, though heavily corrupted, contains fragments of the lure text and the malicious redirector URL. The primary attack pattern involves social engineering to drive clicks to malicious infrastructure.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.link/pify?keyword=app+get+free+food+uk In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/1813b3_b34c14b1409b4cbaa8499b17b12755df.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_7504b0b7e3dc433197a63072daea3542.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0994f9_dea90c03ebe44efab1c8b52c77a5e153.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_275931a6218d46978e50a8921bcc6fe1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_3d3cdd267ba24013aa003dcf96d5fa4c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d78803_ce21ade777c941e58e8e9dad4019d887.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/04e6f9_f5a503c2630f48a2a86ffccd01cd9c6c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3eed2b_ea78889d7f854c9c9c3e97d6de1d77b2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e1a791_aa017546e14a483fb03304a45e5d34c5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/73c254_9d1c800052504c4497f97309c0fe5ac2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_161157c80ca949628ceda4d1d843ee1f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a44510_7d0250c3c61241dcb7646f57bcae1ca9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0896/6301/files/44467184488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1913/1285/files/51106032758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4464/2715/files/mosexitotiruza.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6267 4844 bytes
SHA-256: 83db1ad75c6952086c982736166c612d2ff10c714111633dc30e05162a8df6f1
font_01_sfnt_off000072f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72F8 1796 bytes
SHA-256: dfab3945eace5ba27be1ad95d63d5142397767eab6bca27773794b33bda2302c
font_02_sfnt_off00007b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B82 10292 bytes
SHA-256: c0596eed387f2f36aaa256ae98796039b218e9bea4588db6e553f666f75f0ecd

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