Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e932b785bcad13c…

MALICIOUS

PDF

45.3 KB Created: 2020-08-14 05:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a440fa0a3ae8b66f8c100fa22958d48 SHA-1: 2a22ff0be4140b6dd330f45b69df2fa07dfd8b14 SHA-256: 1e932b785bcad13c4f71dd59cf739da49a3c074af85c747b676feaf9fd06e84a
152 Risk Score

Malware Insights

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

This PDF document contains a mass of external links, many pointing to Shopify domains, suggesting an SEO link farm or a redirection scheme. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/wb?keyword=purgatorio%20canto%2022%20pdf'. The ML classifier also strongly indicated maliciousness. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/wb?keyword=purgatorio%20canto%2022%20pdf
    • http://files.pacifictrackandfield.com/uploads/1/3/1/4/131483955/vifamenadugerug.pdf
    • http://files.joshuastevenpalmer.com/uploads/1/3/0/9/130968984/6949495.pdf
    • http://luvabon.littlenecknews.com/uploads/1/3/1/6/131606027/1266683.pdf
    • https://cdn.shopify.com/s/files/1/0437/2119/5669/files/vusitu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/58932901415.pdf
    • https://cdn.shopify.com/s/files/1/0434/9453/9429/files/2007_saturn_ion_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/voluwipufemezivubujixe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuzodatusowajukekef.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/39895232824.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7913/files/the_road_not_taken_poem_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/7343632255.pdf
    • https://cdn.shopify.com/s/files/1/0435/3759/6575/files/fire_by_kristin_cashore.pdf
    • https://cdn.shopify.com/s/files/1/0437/2866/6785/files/acute_myeloid_leukemia_review_article.pdf
    • https://cdn.shopify.com/s/files/1/0428/3367/4396/files/pewuzipub.pdf
    • https://cdn.shopify.com/s/files/1/0432/3596/7143/files/lair_of_tarn_razorlor.pdf
    • https://cdn.shopify.com/s/files/1/0434/0046/2503/files/common_job_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/pulisezakazilufokol.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066cc.bin
5b590cb114c8092fdf8e60e134440f47c95e03c8d4c44ecc4c58631c5dfeadea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66CC 5012 bytes
font_01_sfnt_off000077da.bin
cd5b3976cd863050e45b35055d42e614b059398698296a04ff435cc857f8d2e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77DA 10220 bytes
font_02_sfnt_off00009a5f.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A5F 4324 bytes

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