Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4d5e39e1c0ab87…

MALICIOUS

PDF

40.5 KB Created: 2020-08-21 23:39:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f8a5967be5325d93578e87c3fa16c73f SHA-1: 3505f397dd2eda03b47c06314357b93b320ce079 SHA-256: 9c4d5e39e1c0ab870f95da6ce396b6e157e229ee489bc18fa0a834851331a00f
194 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous URLs, predominantly hosted on Shopify. One of these URLs, 'https://ttraff.ru/pify?keyword=boss+up+lil+skies', is identified as a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The presence of a large number of external links suggests an attempt to manipulate search engine results or distribute content through a network of linked documents.

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.ru/pify?keyword=boss+up+lil+skies In PDF document text
    • http://files.mackatak.net/uploads/1/3/0/7/130740521/4093272.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5020/4316/files/56786323055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0096/2977/files/2559767103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3210/1543/files/gidebojofum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2733/2252/files/area_of_shapes_formulas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6205/9427/files/evaluation_transformation_physique_et_chimique_5eme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13503036424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9292/6873/files/up_election_result_2020_district_wise_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0185/6679/files/1239148974.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8625/6030/files/sheetz_corporate_office_claysburg_pa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/englisch_rechtschreibung_bungen.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 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5721 4316 bytes
SHA-256: 22114c97ee4b61195c100a0c0a2f51722c7fb943d7f36f1940727813071c3257
font_01_sfnt_off000065cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CD 10544 bytes
SHA-256: 6dd41dce0cfe45e6828220409e528e28120ce9a573061d02b163e5f7206ed8a5
font_02_sfnt_off000087a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87A0 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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