Malicious PDF — malware analysis report

Static analysis result for SHA-256 a680a42462af8622…

MALICIOUS

PDF

36.9 KB Created: 2020-08-03 08:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fa063315ad4c9253425da5c86ff6742 SHA-1: 173a0d88a5c3dc8a923ec954e8ab8e71149e6d0f SHA-256: a680a42462af862244dd806eddffa8c3a56940d087db72d71212217cfc4bbb07
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded links, many pointing to a redirector service at 'ttraff.com'. The document body contains garbled text but includes the same redirector URL and several benign-looking Shopify URLs, suggesting a link farm designed to obscure malicious intent. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=logitech+momo+racing+wheel
    • http://files.forestburgumc.com/uploads/1/3/0/8/130814706/nulikisuk.pdf
    • http://files.kieranwelch.com/uploads/1/3/2/7/132740204/7644323.pdf
    • http://files.duxburygradnite.org/uploads/1/3/2/7/132712093/wuridofe-nifufeb-mepovu.pdf
    • http://files.summoningstone.janaoliver.com/uploads/1/3/1/4/131408170/10333.pdf
    • http://files.marissahollingsphotography.com/uploads/1/3/2/6/132681295/4999656.pdf
    • https://cdn.shopify.com/s/files/1/0428/8384/2215/files/wexinodaxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0933/files/97606988662.pdf
    • https://cdn.shopify.com/s/files/1/0433/6913/6280/files/67947185431.pdf
    • https://cdn.shopify.com/s/files/1/0433/4911/5029/files/wonaleriguseviniwidox.pdf
    • https://cdn.shopify.com/s/files/1/0437/4944/1687/files/xebodijadoja.pdf
    • https://cdn.shopify.com/s/files/1/0433/3967/7861/files/kafenekam.pdf
    • https://cdn.shopify.com/s/files/1/0438/2362/8450/files/wawubujarata.pdf
    • https://cdn.shopify.com/s/files/1/0433/9158/2357/files/ladugipa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5506/2938/files/84977743746.pdf
    • https://cdn.shopify.com/s/files/1/0433/3027/3448/files/semazeladanoto.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/buxigol.pdf
    • https://cdn.shopify.com/s/files/1/0437/2732/3301/files/furototogobezag.pdf
    • https://cdn.shopify.com/s/files/1/0432/0939/2285/files/zuzabaliduwoxan.pdf
    • https://cdn.shopify.com/s/files/1/0431/4746/0768/files/keleropozojopu.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_off0000485f.bin
b1d6c48b6e2989958ca98e5dea638925751231671e63cae3d4cc7c5161b1f556		 pdf-font-stream PDF embedded font (sfnt) at offset 0x485F 4856 bytes
font_01_sfnt_off000058c5.bin
d64225dbc38c8630b4eb79417571a54a4e3800ba7038a73d6de798800b3bc467		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58C5 9268 bytes
font_02_sfnt_off0000786c.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x786C 4324 bytes

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