Malicious PDF — malware analysis report

Static analysis result for SHA-256 38dc67f93321bac7…

MALICIOUS

PDF

43.9 KB Created: 2020-08-13 21:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f946de64e1f77dd47cf5063212b7a896 SHA-1: 5eaa3755dec65268264770040c41d2050c1183ab SHA-256: 38dc67f93321bac748bfbe694dac33271e5f36d9173490b6de092e94321b7564
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=android+root+tool+free'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve search engine ranking for malicious content. No scripts were extracted from this sample, but the embedded malicious URL is sufficient evidence for the attack pattern.

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=android+root+tool+free
    • http://files.evexiawellbeing.com/uploads/1/3/1/4/131406082/ab4c919e41.pdf
    • http://files.leedsfire.org/uploads/1/3/0/7/130738722/vegisufalavizi_duxupurijiwop_jigevafowom.pdf
    • http://files.forwater.ca/uploads/1/3/1/1/131164236/1f6b7f3ee7ac.pdf
    • https://cdn.shopify.com/s/files/1/0437/9279/3757/files/xepepo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/bristol_bus_map.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/38569843151.pdf
    • https://cdn.shopify.com/s/files/1/0452/1204/1367/files/maths_project_for_class_7_on_integers.pdf
    • https://cdn.shopify.com/s/files/1/0428/5317/1356/files/free_separation_agreement_template_alberta.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/sacramentos_catlicos.pdf
    • https://cdn.shopify.com/s/files/1/0437/2784/7576/files/fagefidedosewikap.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7934/files/vevemulajujujosonar.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/lezum.pdf
    • https://cdn.shopify.com/s/files/1/0427/4854/3142/files/efek_samping_obat_analgetik.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_off000061af.bin
1bcc7d357bef8dc704c5f1bc3379192f1defe766c55feeae9013169eb5059b44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61AF 4292 bytes
font_01_sfnt_off0000703d.bin
edbe545b5cbc0ef42e4ff660e2a1bd3920d07c2b14be05fb75599e6ba9e985a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x703D 10368 bytes
font_02_sfnt_off0000938c.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x938C 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.