Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d4c325b506adafe…

MALICIOUS

PDF

55.9 KB Created: 2020-08-21 01:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5177cc7f39448df32ac49eb47d192514 SHA-1: 5ce685a94c860dbefa2b68852fc2365c60198599 SHA-256: 5d4c325b506adafeb25f3453d92ea7d37fe95181f8d0503079f1266245a3355d
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a document about the 'atrocities amendment act 2016', which redirects to a malicious domain. This suggests a phishing or scam attempt. The presence of numerous external PDF links, many pointing to potentially malicious or unknown domains, further supports this. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent.

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.ru/pify?keyword=atrocities+amendment+act+2016+pdf
    • http://bewev.lastoutleatherco.com/uploads/1/3/1/8/131856333/dexawodapawamosim.pdf
    • http://xosebix.iambornmade.net/uploads/1/3/0/9/130969916/jabozo-pafotevil-rutebaba.pdf
    • http://toduvusot.shottsbrassband.com/uploads/1/3/1/6/131636725/karogojitaka.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6484/2647/files/3757755283.pdf
    • https://cdn.shopify.com/s/files/1/0431/3976/0285/files/directv_remote_tv_codes.pdf
    • https://cdn.shopify.com/s/files/1/0437/1359/3499/files/luzizonovit.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8274/files/satuke.pdf
    • https://cdn.shopify.com/s/files/1/0438/8333/1752/files/nipimatevonevum.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/22886975220.pdf
    • https://cdn.shopify.com/s/files/1/0434/1822/2753/files/probability_distribution_function_example.pdf
    • https://cdn.shopify.com/s/files/1/0434/1003/0748/files/10962781111.pdf
    • https://cdn.shopify.com/s/files/1/0438/2910/0701/files/84535301182.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_off00009c74.bin
080a08f0869bfdca6ad475a30c7c33f913727d55b862f8419637d3116b345d7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C74 5740 bytes
font_01_sfnt_off0000afe2.bin
49073943986d463e09592f666f6faaa4eb007f761a1454965e607bab1fde4e88
pdf-font-stream PDF embedded font (sfnt) at offset 0xAFE2 10120 bytes