Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e7b102caccbad21…

MALICIOUS

PDF

46.4 KB Created: 2020-08-04 16:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9b348ac2fdcb49d5bdf18a5eb6031b7 SHA-1: 513b92fda56689c286c74642467b1ab240a41539 SHA-256: 1e7b102caccbad21da414fce77b8a701cf228936335c40df7b8171860bf2ff3b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=statistical+data+collection+pdf'. This indicates the document's primary purpose is to redirect the user to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content. No scripts were extracted, but the document body and heuristics strongly suggest a phishing or redirection attack.

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=statistical+data+collection+pdf
    • http://kedominu.cbspmitchelstown.com/uploads/1/3/1/0/131070718/jujat_gomozifodo_bexizariwede_xatuboxagonevut.pdf
    • http://files.leatherandlavender.com/uploads/1/3/2/6/132682904/wunizozoj.pdf
    • http://files.fbclocustgrovepreschool.com/uploads/1/3/0/9/130969751/19ffed.pdf
    • http://files.psnwrug.com/uploads/1/3/1/0/131071167/2386730.pdf
    • http://files.raewyncaisley.com/uploads/1/3/2/6/132680784/sibutubatokune_xujowawase_rudavelol.pdf
    • https://cdn.shopify.com/s/files/1/0433/7182/3267/files/komunudiguvo.pdf
    • https://cdn.shopify.com/s/files/1/0438/1471/5554/files/72230582251.pdf
    • https://cdn.shopify.com/s/files/1/0428/4992/7327/files/bixiku.pdf
    • https://cdn.shopify.com/s/files/1/0432/2656/2722/files/python_print_float.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/67151130304.pdf
    • https://cdn.shopify.com/s/files/1/0440/3612/8933/files/nosalavumojiminabenaje.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65587220918.pdf
    • https://cdn.shopify.com/s/files/1/0428/6483/6764/files/ropogipozije.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/27328152235.pdf
    • https://cdn.shopify.com/s/files/1/0433/1080/9256/files/tasukigegizudu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/metro_warszawa_mapa.pdf
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/34766598049.pdf
    • https://cdn.shopify.com/s/files/1/0428/0641/1431/files/69784791389.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/waxevuge.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/
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/2732815

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000694f.bin
7c2453e9fbed461a8dfcdf741218a5185c8414d1e1886f1c3ebe3eea49ae136a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x694F 4944 bytes
font_01_sfnt_off00007a1a.bin
dd9c9659c9843cde194dab4b8693a4b677dbac9d04a386d35ea481500860f3fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1A 10456 bytes
font_02_sfnt_off00009dcf.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DCF 4324 bytes

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