Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d87591f3d66f69d…

MALICIOUS

PDF

40.7 KB Created: 2020-08-22 08:26:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1b2187e015a5de7fa6a46be45d76a852 SHA-1: a355b7faeb0adf441bc1587dcc3027f35a518826 SHA-256: 2d87591f3d66f69df540e227c25f361ac532121ad4c38456ff3651a9eb450755
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, includes text suggesting a lure for 'free advertising templates for photographers' and the malicious URL. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent to redirect users to potentially harmful content.

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=free+advertising+templates+for+photographers In PDF document text
    • http://files.wisefeline.com/uploads/1/3/1/4/131438784/dagaderimavixow-gozozibo-muwetopulibab.pdfIn PDF document text
    • http://laxus.gorgehcfa.org/uploads/1/3/0/7/130776553/454445.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/1/0440/8963/9077/files/besuxuxuvavaregewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7668/1882/files/jemulibamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4089/7181/files/78801987066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8042/4351/files/fevakonibujaxupenipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/3274/7672/files/voxinomarelenaxuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3839/8869/files/30181440878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4264/3868/files/fisher_paykel_dishwasher_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/the_gamer_manhwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3223/9528/files/advanced_excel_2020_training_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8238/9406/files/famutef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3683/4981/files/31212883504.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 5

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_off000060d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D9 5468 bytes
SHA-256: b063ef5b4054d38cd07d6dc175a7168e2506e74afe5f5e10a130e2c0978dc492
font_01_sfnt_off00007354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7354 10164 bytes
SHA-256: 570e9355b6c3a5d815a52e7100fb434e8e2c622a0b9af54f4a3e49d4414125d7

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