Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a820b2c1035183c…

MALICIOUS

PDF

41.4 KB Created: 2020-08-01 14:33:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e9615d938777cbda6e0f11456a517f83 SHA-1: 6f7757cd7ff9c2bbf6f5858ed9911bc70249b495 SHA-256: 2a820b2c1035183cfa37188a67fef0a1345ce30332617cd8df87805e6721856a
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'https://ttraff.cc/pify?keyword=square+root+matlab', indicating a lure to a malicious site. The PDF SEO Link Farm heuristic suggests a large-scale effort to distribute malicious links via PDFs.

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=square+root+matlab In PDF document text
    • http://files.phillipsmathandphysics.com/uploads/1/3/1/3/131398362/rapubusalawif-potikoratum-gakada-kibamopivasigev.pdfIn PDF document text
    • http://files.elkhornvalleyhrc.com/uploads/1/3/0/8/130874612/8397628.pdfIn PDF document text
    • http://files.minniemightietopics.com/uploads/1/3/2/7/132740594/tapelap_kamiwotonuwis_zogonorune.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/1/0429/6625/3724/files/bezeromebezusigel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6289/4498/files/57559928811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81858120772.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1423/4013/files/vinugeju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8027/7406/files/32709923770.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78214852322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7802/5377/files/kisolubatipudi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/70531730461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/rotibazudel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/95197592152.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9673/4880/files/39496258783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40814320730.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_off00005e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E31 5024 bytes
SHA-256: 6d48db046a1e1e0dec98cb2c45dbdc0da48706602e6e0c4ddc7bc8781ddb77fa
font_01_sfnt_off00006f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F31 13264 bytes
SHA-256: 1601998811bdd84cce529a1d2259a37b30b5ebc6c501fe37ee0ed4f0c252924d

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