Malicious PDF — malware analysis report

Static analysis result for SHA-256 c710ea1adda2b684…

MALICIOUS

PDF

41.8 KB Created: 2020-08-31 15:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8fc8f2da3bed4dfc43241412032044e SHA-1: f5e7ba14e41e2f60e6c22ab940a6e6c61bbe8af0 SHA-256: c710ea1adda2b684cf0e95b7ee60e1ffd5ec88b4971e3721f40ee226a5636cfc
154 Risk Score

Malware Insights

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

This PDF file contains a critical heuristic firing indicating it acts as a malicious redirector, pointing to 'ttraff.com'. The document body also contains this URL, alongside numerous other links to Shopify, likely part of a link farm to improve SEO for the malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to a malicious site via a deceptive link.

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/wix?keyword=bootstrap+4+book+pdf
    • https://cdn.shopify.com/s/files/1/0438/3395/0358/files/alliance_x_empire_gear_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0697/5382/files/mijobotatevigemejoji.pdf
    • https://cdn.shopify.com/s/files/1/0436/5815/0046/files/zedap.pdf
    • https://cdn.shopify.com/s/files/1/0434/8634/7414/files/job_inquiry_letter.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/hacker_raspberry_pi.pdf
    • https://cdn.shopify.com/s/files/1/0436/7699/1653/files/pimugajakuxiribatudo.pdf
    • https://cdn.shopify.com/s/files/1/0440/0329/5382/files/wbc_phone_number.pdf
    • https://cdn.shopify.com/s/files/1/0428/5975/7734/files/geographic_information_systems_an_introduction_tor_bernhardsen.pdf
    • https://cdn.shopify.com/s/files/1/0434/1461/8262/files/37701743613.pdf
    • https://cdn.shopify.com/s/files/1/0460/4126/8388/files/simple_addition_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0435/5106/4228/files/kudaw.pdf
    • https://static.usrfiles.com/ugd/ab059d_36660154545345a2b2093218add3a787.pdf
    • https://static.usrfiles.com/ugd/b8c837_f35a962480e54ace8f9c5c15881ffbbf.pdf
    • https://static.usrfiles.com/ugd/b8c837_7859c7c65faa4e118d26c53da8b0fea7.pdf
    • https://static.usrfiles.com/ugd/760101_335d0974e5c5434983c80417e0e18df7.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065e1.bin
f64138c3fa2c03adea927815003afed3fe60d602a69c83506973c9b7e22cddcd
pdf-font-stream PDF embedded font (sfnt) at offset 0x65E1 5344 bytes
font_01_sfnt_off00007820.bin
8a2b450892fb2d78583b84cbd27f065379e8c6065b9e4220431c01afa75cd19c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7820 10240 bytes