Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cb3249873057d72…

MALICIOUS

PDF

41.3 KB Created: 2020-07-31 20:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7dca24c0bb7505ee6d7fe10bff2d3a7 SHA-1: c0d2c4067fc28db8d1eac2c3a00f698e7a19e40c SHA-256: 1cb3249873057d72c0793be9aaca413729d4640cfb3d2443b90223b35f668bba
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=pub+to+pdf'. The document body also contains this URL and a "Pub to pdf" lure, suggesting a phishing or malware distribution attempt. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=pub+to+pdf
    • http://files.doctorsinrecital.org/uploads/1/3/1/6/131637896/gevifotivujivil.pdf
    • http://files.malcolmdeweyfineart.com/uploads/1/3/1/6/131607331/9115021.pdf
    • http://files.writersabodeen.com/uploads/1/3/1/3/131383934/mizetuxasopive_jamoraketerodaz.pdf
    • http://files.lexispanier.com/uploads/1/3/1/8/131857717/7724776.pdf
    • http://files.miiaesthetix.com/uploads/1/3/0/7/130740586/dosixoru-xavorufodijajad-sogarasumaziwe-takabufoviz.pdf
    • https://cdn.shopify.com/s/files/1/0434/7337/1288/files/sosopore.pdf
    • https://cdn.shopify.com/s/files/1/0432/3534/4539/files/sasevilalunojezeli.pdf
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/22571922024.pdf
    • https://cdn.shopify.com/s/files/1/0437/1880/3607/files/fatelojenadaron.pdf
    • https://cdn.shopify.com/s/files/1/0430/9961/9492/files/25221633857.pdf
    • https://cdn.shopify.com/s/files/1/0428/7207/8499/files/83917747393.pdf
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/83775588108.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4952854333.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0721/files/sugebefibaraki.pdf
    • https://cdn.shopify.com/s/files/1/0436/8669/0969/files/wutijilulenesokoredu.pdf
    • https://cdn.shopify.com/s/files/1/0436/7020/8662/files/25446327248.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_off0000568b.bin
f04768eb9715c9c5d27202c75f156f2b6efefdaf5a83e73680bbfb3a55bff420		 pdf-font-stream PDF embedded font (sfnt) at offset 0x568B 4272 bytes
font_01_sfnt_off00006503.bin
696b823190dd518d924fe524d93d3e695c17b8c60a71e4214275c3f94452a948		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6503 12108 bytes
font_02_sfnt_off00008ab6.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB6 4324 bytes

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