Malicious PDF — malware analysis report

Static analysis result for SHA-256 7abaf6897a96fabd…

MALICIOUS

PDF

48.3 KB Created: 2020-08-23 20:45:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ac7ff99fcbb67a64d4cebcb388d296c SHA-1: f8bc8b4de832c448d62b8327046d33abfa8e9524 SHA-256: 7abaf6897a96fabd7ccc2bee1b2f872a446e0fe39b985bc343109c49930e580d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Facebook page branding guidelines' and the malicious URL, suggesting a phishing or social engineering lure. The presence of multiple external PDF links further indicates a link farm or redirection scheme.

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=facebook+page+branding+guidelines
    • http://wubaxi.csautoelite.com/uploads/1/3/1/4/131437423/261c8.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/pizegavegip.pdf
    • https://cdn.shopify.com/s/files/1/0436/1751/7725/files/jaxopexizufojepenixeduz.pdf
    • https://cdn.shopify.com/s/files/1/0428/5235/2159/files/carcinoma_basocelular_sclerodermiform.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54313135065.pdf
    • https://cdn.shopify.com/s/files/1/0431/5296/5792/files/international_business_strategy_verbeke.pdf
    • https://cdn.shopify.com/s/files/1/0432/0398/5570/files/12477707419.pdf
    • https://cdn.shopify.com/s/files/1/0434/0767/1453/files/herne_bay_junior_school_ofsted_report.pdf
    • https://cdn.shopify.com/s/files/1/0437/0844/8919/files/radinukorunisovexaranok.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5276/files/zobejuviziravesus.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_off0000713c.bin
2feb591eadef8399d8f272576c59af1ea540233c77b54a6be39f362040fe8cb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x713C 5204 bytes
font_01_sfnt_off000082dc.bin
529879cfcd24af0ec7b652815af0bfe7146af1ea7061d316db6b67d672c18a82
pdf-font-stream PDF embedded font (sfnt) at offset 0x82DC 10380 bytes
font_02_sfnt_off0000a633.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xA633 4324 bytes