Malicious PDF — malware analysis report

Static analysis result for SHA-256 277daa80bdafe8f7…

MALICIOUS

PDF

43.3 KB Created: 2020-08-26 05:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cc614300122d3d9fb470872e0ea9923c SHA-1: 375fb8c5fa5d119bf4acacb2d70b189bfcfbdacb SHA-256: 277daa80bdafe8f75c28c6413d69924519dc79dfd475723c74743da4d07297ab
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=skyrim+fullscreen+windowed In PDF document text
    • http://files.khaagwa.org/uploads/1/3/1/6/131637056/1681961.pdfIn PDF document text
    • http://files.labsavvy.org/uploads/1/3/2/6/132695746/novopokozi.pdfIn PDF document text
    • http://files.barriointellect.com/uploads/1/3/2/7/132740321/104c7d.pdfIn PDF document text
    • http://files.academictranscripts.com.au/uploads/1/3/0/7/130740625/tafefuf.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/1/0437/3518/7605/files/delete_discord_server.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4468/4454/files/discrete_mathematical_structures_6th_edition_kolman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4583/8234/files/vadirimusepaworowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9699/8048/files/38001624653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3966/0954/files/aadhar_card_photo_change_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5920/7582/files/xaradonenuzegajuvake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3583/6061/files/2746966715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7370/7925/files/64639676550.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96280370261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0763/0747/files/certificat_de_vie_commune.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_off00006b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6D 5320 bytes
SHA-256: 5bf935ac59787cdb03b900cf6235ab48a8a53fea5d232eb1d0c50be1de235cd7
font_01_sfnt_off00007d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D82 10280 bytes
SHA-256: 4f1f8e067aa8a658f85849a1aaa740d304e28fc88683def678ee8ce211693ff8

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