Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d702bea6defc34…

MALICIOUS

PDF

49.3 KB Created: 2020-08-06 05:11:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1056e2423021ecc755492cbbaebe6a6e SHA-1: af21608a47b54137b43dd07b50d27e717727535e SHA-256: 12d702bea6defc34a17caeeabc394e6ae6e9590f2b002980bac0f0b4c1850cee
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that appears to be part of this link farm. This suggests the document is designed to lead users to malicious websites, likely for phishing or malware distribution.

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=revised+atlanta+classification+for+acute+pancreatitis+a+pictorial+essay+pdf
    • http://files.mametcalfe.com/uploads/1/3/2/8/132814567/galomakanivet-tumorifujita-modiwa-lujaga.pdf
    • http://files.digitalsimon.com/uploads/1/3/0/7/130775997/1095754.pdf
    • http://files.bethlehem-elgin.org/uploads/1/3/1/3/131398605/guneruw_nonekiserolet.pdf
    • http://files.evolverealty.ca/uploads/1/3/2/7/132740408/kixit-nujatolop-wikixet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9572/8029/files/7443484275.pdf
    • https://cdn.shopify.com/s/files/1/0434/7982/6597/files/fadagekizujirejonazebutof.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1549/files/88560927081.pdf
    • https://cdn.shopify.com/s/files/1/0435/1252/9055/files/toxuzavebowajipaxekedabe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2033/6807/files/duvizinikokozixeja.pdf
    • https://cdn.shopify.com/s/files/1/0431/3579/5354/files/940828958.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/45768353837.pdf
    • https://cdn.shopify.com/s/files/1/0427/8566/9279/files/zarodonada.pdf
    • https://cdn.shopify.com/s/files/1/0430/6341/0845/files/xewutofogokoneja.pdf
    • https://cdn.shopify.com/s/files/1/0431/5712/7336/files/4643845611.pdf
    • https://cdn.shopify.com/s/files/1/0428/0696/8483/files/mawodewi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/79700293718.pdf
    • https://cdn.shopify.com/s/files/1/0434/0894/9402/files/nijegowozewexegaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/7668/8798/files/578821097.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_off00007fc7.bin
a15ceb0f4bf73921094faccb3c30100f557f394dd0c8e9d04347ac430c539e54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC7 5320 bytes
font_01_sfnt_off00009203.bin
c9c242b2df6aa590db358006667f29dfae8e1e2b02b10db3df85283eb28d5243		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9203 11548 bytes

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