Malicious PDF — malware analysis report

Static analysis result for SHA-256 c947585dfafe7444…

MALICIOUS

PDF

42.7 KB Created: 2020-08-13 04:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 53e195a5d85b81fb1950e619b608b637 SHA-1: 9df3a72123eb51a22c32a068c829cda3608649dc SHA-256: c947585dfafe7444372ae41615956f739401bec87e77180ab4e93e6fde1d85c6
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a likely phishing or SEO poisoning attack. The document body, though heavily corrupted, contains text related to 'Android studio 3.5 development essentials pdf' and a URL that appears to be a lure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=android+studio+3.+5+development+essentials+pdf, which is flagged as a malicious redirector. No scripts were extracted from this sample.

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=android+studio+3.+5+development+essentials+pdf In PDF document text
    • http://files.wholesale.fanhubnw.com/uploads/1/3/1/3/131379828/juvuzuvitaketik_vazaguxozizize.pdfIn PDF document text
    • http://xakafixa.comiccutdown.com/uploads/1/3/1/4/131407227/pebipuligasurow.pdfIn PDF document text
    • http://files.mariacioe-pena.com/uploads/1/3/1/1/131163943/6298000.pdfIn PDF document text
    • http://safikotu.lensdefender.com/uploads/1/3/0/9/130969306/7550932.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/1/0431/0935/1585/files/22841580167.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/6986/9975/files/basic_integral_formulas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5598/6326/files/patterns_of_enterprise_application_architecture_1st_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4143/0440/files/55323435250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2468/5975/files/gasidexemejewajapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0602/4101/files/vegetubozagenelobip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9980/7126/files/65898051099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/aegon_religare_iterm_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5443/2410/files/tituxukowukezinolov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0162/4214/files/67680143045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/integral_calculus_by_shanti_narayan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3723/7146/files/85151304115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3830/8512/files/sokuvoxorituvo.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
🗂 Part of campaign: lensdefender.com 4 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D9 5556 bytes
SHA-256: 8829d287f1954304faee2a30b8794d0e1513aff435ad487f365c891bb5c8babf
font_01_sfnt_off00007bb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB2 9936 bytes
SHA-256: 1078356fb95abc772d2ea1313193243aaeee162c66fcdeb14e773201c5c90730