Malicious PDF — malware analysis report

Static analysis result for SHA-256 195831da4dbc7cfc…

MALICIOUS

PDF

33.2 KB Created: 2020-08-26 07:12:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b0f83707c95ba10288914c6e4a9fcb0 SHA-1: e49dcb76554bd57b9dc8cc831b9f5ff8972abcf1 SHA-256: 195831da4dbc7cfc1a1141711710203bc71c5a6fb24c84b5cfa50d25775a5d31
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged as malicious by a machine learning classifier and contains a link to a known malicious redirector infrastructure at 'ttraff.com'. Additionally, it hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. The primary malicious indicator is the redirector link, which is likely used to funnel users to a malicious site.

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=stop+milk+sale+fs17
    • http://files.victoryhinesville.com/uploads/1/3/0/7/130739618/pakexab-pudurivelixa.pdf
    • http://gibozudun.monitor-io.com/uploads/1/3/1/3/131398140/066b316da.pdf
    • http://files.dianavgustafson.com/uploads/1/3/2/6/132681556/cbb2f1dfa.pdf
    • http://files.cofhhe.org/uploads/1/3/1/0/131071037/vibesuni.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8785/4749/files/42019546264.pdf
    • https://cdn.shopify.com/s/files/1/0434/0265/7957/files/91587404352.pdf
    • https://cdn.shopify.com/s/files/1/0431/0967/9265/files/flannelette_sheets_queen_target.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5057/files/thyroid_diet_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/2990/6079/files/70665627511.pdf
    • https://cdn.shopify.com/s/files/1/0438/4922/0256/files/sublime_text_crack.pdf
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/nusapipuvaduzuvibeza.pdf
    • https://cdn.shopify.com/s/files/1/0432/0909/7376/files/relationship_between_sociology_and_anthropology.pdf
    • https://cdn.shopify.com/s/files/1/0436/1243/8685/files/mizutexajimoriwuvexudiko.pdf
    • https://cdn.shopify.com/s/files/1/0431/3278/0695/files/40822665316.pdf
    • https://cdn.shopify.com/s/files/1/0438/0898/1153/files/23994583180.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045b5.bin
c70ee9c9ebbfa504527866d99030f0d9290028b2655d1be1d2f316000cba0753
pdf-font-stream PDF embedded font (sfnt) at offset 0x45B5 5248 bytes
font_01_sfnt_off00005789.bin
88a41ec2c901389f1f72d7f780bc9b241ab22542595747c22fc0ccb1006f33bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5789 9580 bytes