Malicious PDF — malware analysis report

Static analysis result for SHA-256 406c570174e4cbc4…

MALICIOUS

PDF

48.5 KB Created: 2020-08-04 16:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cca0da0c3977dbe936f339d80777715d SHA-1: c7387db3d860a260a1bb730220ad9ea674d2412c SHA-256: 406c570174e4cbc4bcd6ad28396fe6a0a40a2d159ec3551c4e795a8196e436f4
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The document body, though partially corrupted, contains text related to animals and a URL that appears to be a lure. The primary malicious URL is https://ttraff.cc/pify?keyword=list+of+herbivores+carnivores+and+omnivores+animals+with+pictures+pdf, which is a known redirector. The document also contains numerous links to Shopify-hosted PDFs, likely part of an SEO poisoning or link farm strategy.

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=list+of+herbivores+carnivores+and+omnivores+animals+with+pictures+pdf
    • http://files.goods4ullc.com/uploads/1/3/0/9/130969826/xiluduza_xulinu.pdf
    • http://files.harrytadd.co.uk/uploads/1/3/1/4/131452988/peponibemi.pdf
    • http://files.emmanoelleclark.com/uploads/1/3/1/0/131070508/leseleg_lukaxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89089693040.pdf
    • https://cdn.shopify.com/s/files/1/0437/6566/1845/files/skyrim_dance_mod.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/bwwm_books.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/32187279675.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/github_markdown_css.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/american_standard_gold_series_furnace_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/19396703736.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7308/files/mappa_bardonecchia.pdf
    • https://cdn.shopify.com/s/files/1/0445/3544/7711/files/architectural_design_of_school_building.pdf
    • https://cdn.shopify.com/s/files/1/0434/0485/3406/files/guxik.pdf
    • https://cdn.shopify.com/s/files/1/0430/7143/9001/files/fefebijefubafel.pdf
    • https://cdn.shopify.com/s/files/1/0433/8784/6806/files/49512098342.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_off00006fee.bin
b18e2c9a785b13446117cb939a0a1e808babe7246787e217a56fac825d0481dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEE 5512 bytes
font_01_sfnt_off00008287.bin
de5d8a6239ce529972a1235a3baa4f7a50f71866a7d56a5fd5ef07c50061e498		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8287 10452 bytes
font_02_sfnt_off0000a629.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA629 4324 bytes

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