Malicious PDF — malware analysis report

Static analysis result for SHA-256 6956b820d48f621b…

MALICIOUS

PDF

39.9 KB Created: 2020-08-01 20:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3f3f8b37db1031f0967bb073406ac46 SHA-1: eb6de4797f2055a6a3c51ddd16a88e2f952fc966 SHA-256: 6956b820d48f621b8ae7773cc9741dac7f47067e2a83f1d10912630358f571d4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL is identified as malicious. This suggests an attempt to lure users into clicking through a series of links, potentially leading to a malicious download or exploit. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=fate+zero+opening+1
    • http://files.patsendangeredanimals.com/uploads/1/3/2/7/132740670/nijirar.pdf
    • http://files.wonderfoldwagon.com/uploads/1/3/1/4/131453733/zonalibegoraxejene.pdf
    • http://files.asbraveaslandon.com/uploads/1/3/2/7/132712116/guxitaxojed.pdf
    • http://files.migrants.scot/uploads/1/3/1/3/131378999/1159745.pdf
    • http://files.katherinehelena.com/uploads/1/3/0/7/130776407/ee5020.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2962/4992/files/fotexiboniwebogo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5430/9280/files/juxoko.pdf
    • https://cdn.shopify.com/s/files/1/0438/1248/7328/files/17664761713.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/pdf_to_rtf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/77963671260.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91300886864.pdf
    • https://cdn.shopify.com/s/files/1/0437/1090/6520/files/10292241101.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/potiwabuvufepatene.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/59382065437.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8918/files/44860385430.pdf
    • https://cdn.shopify.com/s/files/1/0429/2601/4620/files/jotedowimatutedo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3352/5400/files/keforute.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/nogapamokaxew.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000571d.bin
0054d4d0f99a4e722464be5221b91bfae71438e7177a250b98e88a9999159e34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x571D 4836 bytes
font_01_sfnt_off000067b0.bin
1d02250741e4f5f083e3d1f30226511f341c6c13055e050ebd7c023dac8666fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67B0 13420 bytes

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