Malicious PDF — malware analysis report

Static analysis result for SHA-256 088c677432d74c1c…

MALICIOUS

PDF

48.5 KB Created: 2020-08-05 16:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80d291540edeb48f5ffc02c3727a6c77 SHA-1: a57c964e3cccb7c4d88fcae15689d5bb34cbd1be SHA-256: 088c677432d74c1cfc1b75e8ad7a36d9891e1e9102a67dc2c07229aa8813247c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.cc/pify. It also exhibits characteristics of a PDF link farm, with numerous external links, many pointing to Shopify domains. The ML classifier strongly flagged this PDF as malicious. The embedded URLs suggest an attempt to lure users to external sites, likely for phishing or to download further malicious content.

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=bayly+birth+of+the+modern+world+pdf
    • http://files.turtlemoondesigns.shop/uploads/1/3/1/6/131636855/4459eefaa72.pdf
    • http://files.alamodekabashsewingshop.com/uploads/1/3/2/6/132682113/botokinosedabevug.pdf
    • http://files.boydenschoolpac.com/uploads/1/3/0/7/130775373/lozidodobitubarata.pdf
    • http://files.richardzsantos.com/uploads/1/3/2/7/132712268/1463250.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasebiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/womavujeximonuzara.pdf
    • https://cdn.shopify.com/s/files/1/0430/0845/8905/files/sutafominu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/15326689286.pdf
    • https://cdn.shopify.com/s/files/1/0433/9220/4950/files/37444227846.pdf
    • https://cdn.shopify.com/s/files/1/0431/3484/5079/files/zupeto.pdf
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/donoxeri.pdf
    • https://cdn.shopify.com/s/files/1/0438/6642/3456/files/70657199267.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4665/files/22969769244.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70278744099.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/tilamed.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_off00007339.bin
d30fca699579a477386a3f356a0dfcd9cb53e420ef857b17bb884496b60937f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7339 5272 bytes
font_01_sfnt_off00008508.bin
4fd8a2b5eda12745ffcb10ed5f094bcbc631ab6141b4c06b425c277d8bf99168		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8508 9812 bytes
font_02_sfnt_off0000a69c.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA69C 4324 bytes

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