Malicious PDF — malware analysis report

Static analysis result for SHA-256 53d3942f7b7687d5…

MALICIOUS

PDF

57.4 KB Created: 2020-08-08 14:00:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2374cb0041d4f22acdb50e34d7aa5007 SHA-1: b19eee030aec1071bf618c2f49a150004ff0ddc9 SHA-256: 53d3942f7b7687d549efe21651f6bfbf85f910c355c82ca7eacca7ce7d4e959a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'https://ttraff.cc/pify?keyword=cd+action+1999+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the extensive link farm and the malicious redirector suggest a phishing or scam attempt.

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=cd+action+1999+pdf
    • http://solejaxu.lhfministries.com/uploads/1/3/2/8/132815028/rugon-kofunofi.pdf
    • http://files.bredymyers.com/uploads/1/3/0/7/130739379/sapawumakuzokikaju.pdf
    • http://files.pokerwithjimmy.com/uploads/1/3/0/7/130775002/5524142.pdf
    • http://files.chaletalpemassif.com/uploads/1/3/1/8/131856170/xevududif.pdf
    • http://files.pokerwithjimmy.com/uploads/1/3/0/7/1307
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19463184481.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0979/files/momubogozijivakulepamuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/jazuruwapitilozabaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/cessna_182_ipc.pdf
    • https://cdn.shopify.com/s/files/1/0447/6259/5477/files/spurious_correlations_tyler_vigen.pdf
    • https://cdn.shopify.com/s/files/1/0434/8212/0357/files/35413730995.pdf
    • https://cdn.shopify.com/s/files/1/0429/6923/5619/files/wupotivikerapu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4637/9426/files/personality_disorders_types.pdf
    • https://cdn.shopify.com/s/files/1/0431/5506/2938/files/78636638332.pdf
    • https://cdn.shopify.com/s/files/1/0449/6611/7544/files/spanish_definite_and_indefinite_articles_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1987/files/32308600641.pdf
    • https://cdn.shopify.com/s/files/1/0430/8025/3593/files/gugop.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082e2.bin
36e6364eb6187add1c5e52cb44562304fea25a8d5c95e5b3f275f6b8fef04395		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82E2 4956 bytes
font_01_sfnt_off000093d2.bin
149738eb3e1d0bfb4a5732e89a115965e6f0cf3fc4971c694d3ce3619176544d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93D2 6148 bytes
font_02_sfnt_off0000a3b1.bin
2960ca289772c8b0e6071a9abd4a90426a5f9fec7cf45491334146993c9488d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3B1 16988 bytes

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