Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8f8031cf37e0473…

MALICIOUS

PDF

45.3 KB Created: 2020-08-12 22:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 34e6eee18052533a251240ee9acb6dc8 SHA-1: 4cbcdf301357f39e5704fea72a2586c4fa97d9dd SHA-256: c8f8031cf37e047378c93da6a8e2c5b553cadbb0f55bd8bef000c9568c1e8dff
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure for 'Acca f6 malaysia textbook pdf'. The primary malicious URL identified is https://ttraff.com/pify?keyword=acca+f6+malaysia+textbook+pdf, which likely serves as a gateway to further malicious content. The presence of numerous Shopify links suggests an attempt to blend in with legitimate content while hosting the malicious redirector.

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.com/pify?keyword=acca+f6+malaysia+textbook+pdf In PDF document text
    • http://lizum.aislingrichmond.com/uploads/1/3/1/6/131606349/lukosudeti.pdfIn PDF document text
    • http://files.thelearningcay.com/uploads/1/3/2/8/132814898/kajadofawivebo.pdfIn PDF document text
    • http://files.kahua-ranch.com/uploads/1/3/0/7/130775940/9540034.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/1/0433/0687/7080/files/70339383958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/8441/1033/files/latex_beamer_einbinden.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8647/1587/files/zurumawilogetajawomoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7400/0798/files/34072530652.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/kuvojoxoguxisuroluxazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1899/3320/files/mijesolodavozemusubalem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1026/7035/files/31961544179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6630/2376/files/romoloxerokimukunurotufeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9284441163.pdf?v=1594212706In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7441/0901/files/21439747952.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000657a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657A 5404 bytes
SHA-256: a05defe8e42f050bcc4ce92fb9af8c12dd6fd7d03831591448be444a7e5e975b
font_01_sfnt_off000077e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77E7 10096 bytes
SHA-256: 1c0f5ecb9ac19ec79ef5681b33542bb8024916c5733aa5edf0956fdc1455a0c9
font_02_sfnt_off00009a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A6D 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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