Malicious PDF — malware analysis report

Static analysis result for SHA-256 199b4562da9d1cdb…

MALICIOUS

PDF

54.8 KB Created: 2020-08-03 22:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5297850d2f376dd8a24b45790cf72dd SHA-1: 35256c786927c2dd508bb6a82686368194b242cf SHA-256: 199b4562da9d1cdba0df2c88cd9f425f2a6fc5996f74de04a117005b91a08905
174 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector (ttraff.cc). The document body, though heavily obfuscated, contains text suggesting a lure related to 'Pizza max biella' and includes the malicious URL. The presence of a link farm and a critical ML classification further support malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=pizza+max+biella+pdf
    • http://files.furnishingnewfrance.org/uploads/1/3/0/8/130873895/milakubogilonixed.pdf
    • http://files.lefthandedgolfaustralia.com/uploads/1/3/0/7/130776314/8595320.pdf
    • http://files.danskasfalt.com/uploads/1/3/2/6/132695543/lezuduzuditi.pdf
    • http://files.haralsoncountyhistory.com/uploads/1/3/2/6/132681294/6507146.pdf
    • http://files.farmlakeoutpost.com/uploads/1/3/2/7/132710763/cff8c1a8b0b0fa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/9720/1567/files/67183826380.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/vorefinesomefobaxid.pdf
    • https://cdn.shopify.com/s/files/1/0432/9157/4430/files/33887020649.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jatebilebasa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6078/8390/files/74610455138.pdf
    • https://cdn.shopify.com/s/files/1/0437/8787/8549/files/fluid_mosaic_model_definition.pdf
    • https://cdn.shopify.com/s/files/1/0439/3769/3851/files/legend_of_zelda_nes_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/nekurivilunibufegiponizuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/7905/7056/files/mubefedago.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/28664871254.pdf
    • https://cdn.shopify.com/s/files/1/0432/2266/3325/files/nepalirodetomedupujerasa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8434/1657/files/zojud.pdf
    • https://cdn.shopify.com/s/files/1/0432/4114/4483/files/how_to_pair_plantronics_backbeat_fit.pdf
    • https://cdn.shopify.com/s/files/1/0434/2556/2775/files/99772092118.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_off00008bb7.bin
621f63c8379186e37b6e3a96fa7d3037c5ba5d8b97a4efa2a16e403b3f39ee67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB7 4664 bytes
font_01_sfnt_off00009b9a.bin
c376e702cd6ac3de5d47341d0a88768730b1c1e477e759fe578ec88622a40218		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B9A 10684 bytes
font_02_sfnt_off0000bfb6.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFB6 4324 bytes

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