Malicious PDF — malware analysis report

Static analysis result for SHA-256 63173419060b1be1…

MALICIOUS

PDF

43.1 KB Created: 2020-08-17 18:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91d7e1e061d24fc3eb86099d3fa34d2b SHA-1: 445373e74fa1b5fa5941dad88a372e22fc625499 SHA-256: 63173419060b1be11d3f5e6262cf04d5a03d5e4bf7fe83d8c256e61b3249a9f6
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to disguise the malicious intent. The presence of a link farm and a high ML classifier score further support the malicious nature of this document.

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=8+ball+pool+apk+long+line
    • http://files.immigrationbenchmarking.org/uploads/1/3/1/4/131407299/kamag.pdf
    • http://wibego.rubinvisalaw.com/uploads/1/3/0/7/130738850/menorolotireg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/9482/6405/files/19989183737.pdf
    • https://cdn.shopify.com/s/files/1/0434/0842/5116/files/folopabolono.pdf
    • https://cdn.shopify.com/s/files/1/0433/9597/3276/files/cambridge_english_vocabulary_games_and_activities.pdf
    • https://cdn.shopify.com/s/files/1/0434/1035/8439/files/process_of_glycolysis.pdf
    • https://cdn.shopify.com/s/files/1/0437/2817/5255/files/kedeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/26767434151.pdf
    • https://cdn.shopify.com/s/files/1/0445/3960/9252/files/de_gennes_capillarity_and_wetting_phenomena.pdf
    • https://cdn.shopify.com/s/files/1/0431/6417/2445/files/89004456414.pdf
    • https://cdn.shopify.com/s/files/1/0433/2421/1354/files/79242703723.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5912/files/begakosavawepogekazev.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ed0.bin
3f4ffa1ca1e1a29b719a43a579b934e847a3ccdf309b30433501cc0ce0ef6ff7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED0 4724 bytes
font_01_sfnt_off00006ed6.bin
6426e56a8e15064444a9c04060f8bb0cc1390f354d11c34f6a09ec5a11ed95e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED6 10156 bytes
font_02_sfnt_off000091a0.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x91A0 4324 bytes