Malicious PDF — malware analysis report

Static analysis result for SHA-256 f52870cc72e48bc8…

MALICIOUS

PDF

58.2 KB Created: 2020-08-09 23:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4c7887ca72c71af699aed531be55289e SHA-1: 719bfcae7aeaa1bc7825d12b7acdf87e575f5920 SHA-256: f52870cc72e48bc89e5c58fa034b50d8d402b500cc7988ac15fe0748c461c959
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for interview questions. This URL redirects to `https://ttraff.cc/pify?keyword=interview+questions+for+maintenance+manager+pdf`, which is also listed as an IOC. The PDF also exhibits PDF_SEO_LINK_FARM behavior, with numerous external links, including one to `https://cdn.shopify.com/s/files/1/0433/3161/6923/files/bitter_gourd_diabetes.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=interview+questions+for+maintenance+manager+pdf In PDF document text
    • http://files.artisaninc.com/uploads/1/3/1/4/131406036/2809186.pdfIn PDF document text
    • http://files.katiegmitchell.com/uploads/1/3/0/7/130775867/9284372.pdfIn PDF document text
    • http://files.insituvision.com/uploads/1/3/0/9/130969004/2973768.pdfIn PDF document text
    • http://files.speechhighway.com/uploads/1/3/1/3/131398366/8231503.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/1/0433/3161/6923/files/bitter_gourd_diabetes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6032/0669/files/52051578498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9880/7202/files/almagesto_ptolomeu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2770/1655/files/wogokofenilidajop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7834/4097/files/divasodumofuxixinakikewix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/neumonia_tratamiento_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53940500656.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6528/6564/files/26980892038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8191/5798/files/51899593378.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2634/1272/files/moribagalejalum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5402/3327/files/zovimutidezozejerofoku.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 7

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_off0000a378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA378 5660 bytes
SHA-256: 81f465424dff72f66eeb5e2fbc1225dcd8149b11495f66e2fd3483dfba7aafa6
font_01_sfnt_off0000b6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6B1 10852 bytes
SHA-256: a24329a8cac906cead2b08d56abecf0fe6cc74e152070ae1c5fc64f017fe73c3

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