Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a6d51fc4d537482…

MALICIOUS

PDF

93.0 KB Created: 2020-08-04 11:33:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ba397bd4f444d43ec35dc3bda12d1ec SHA-1: 1c5c19ee68772c1ea13d8aed84273bb0dee281c3 SHA-256: 5a6d51fc4d5374820bb2f1fe9df29ed3ed2eb1c0568c2f82ed73ad499e76b074
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure. The embedded URL, 'https://ttraff.ru/pify?keyword=barakhadi+in+english+chart+filetype+pdf', is the primary indicator of malicious intent. The document body also contains this URL, suggesting it's the intended lure. 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.ru/pify?keyword=barakhadi+in+english+chart+filetype+pdf
    • http://files.sawdustsistersbirdhouses.com/uploads/1/3/1/3/131383255/6e8a76.pdf
    • http://files.totallysocialasd.com/uploads/1/3/0/9/130969265/zijafusolud-bijaloxizidomaz.pdf
    • http://files.masdo.org/uploads/1/3/2/8/132815123/mafokis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40133843423.pdf
    • https://cdn.shopify.com/s/files/1/0428/5209/0022/files/bulodesebikojikexu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9109/0844/files/pepopakawezokibadojod.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/kodoloka.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/69901713801.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3573/files/41474724824.pdf
    • https://cdn.shopify.com/s/files/1/0429/4685/5078/files/41389007020.pdf
    • https://cdn.shopify.com/s/files/1/0436/2344/8736/files/lapokawir.pdf
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/xivalekelowalolateliwunat.pdf
    • https://cdn.shopify.com/s/files/1/0429/0304/4263/files/50814474833.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc0a.bin
f0b14c9c474193f64e1b36abf0e1fc614370935cd4b50ca45cc7ab6fc1a24199		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0A 5308 bytes
font_01_sfnt_off00010e14.bin
f4823840a7f89044eeeef13bbfcf8279be711b471c16c4a3b156c593f430bdc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E14 15228 bytes
font_02_sfnt_off00013e23.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E23 4324 bytes
font_03_sfnt_off00014c23.bin
b3e1c9053ffff8c5d1a12f193dd7920c10d2ba0dfa0225f26b73768d94113bfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C23 7116 bytes

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