Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b4a48e89d7ec0c5…

MALICIOUS

PDF

52.0 KB Created: 2020-08-04 14:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 429f2cd7b6e6b1ab8c0f954570beb01b SHA-1: 3850831be42c1019bbb4e22c4edb3e421b0b6c45 SHA-256: 5b4a48e89d7ec0c536cf1e1a500e0b4fb7143840e486cea3175d356c4dbda175
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to what appears to be a link farm designed to host other PDFs. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.cc'. This suggests the document is designed to lead users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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.cc/pify?keyword=customary+law+in+south+africa+pdf
    • http://files.bookcellarlwonline.com/uploads/1/3/1/8/131860787/xejapami.pdf
    • http://files.tutystenac.com/uploads/1/3/0/7/130775154/wujagejopamo.pdf
    • http://files.amjetaviation.com/uploads/1/3/0/9/130969522/f9b231.pdf
    • http://files.sailongrain.com/uploads/1/3/0/8/130874554/xaxixabupuwas_xagosokuji_sowujisem_kidexuwene.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16779745642.pdf
    • https://cdn.shopify.com/s/files/1/0428/7512/5923/files/buxalulizevudok.pdf
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/adiemus_chords.pdf
    • https://cdn.shopify.com/s/files/1/0432/0729/5140/files/juramuxuba.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/kovidafolozenuliligisivi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/5120621141.pdf
    • https://cdn.shopify.com/s/files/1/0438/7530/3592/files/16287482521.pdf
    • https://cdn.shopify.com/s/files/1/0433/0966/2366/files/fenekavoxobunijozenerub.pdf
    • https://cdn.shopify.com/s/files/1/0431/5480/0796/files/law_of_conservation_of_momentum_problems_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0435/4339/6506/files/genibupaxowo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6983/files/9318207832.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_off00008cea.bin
e78fedec94399ba74218da8ccf50fc2de7843607cfa98b9492df72a90e8f38f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CEA 5492 bytes
font_01_sfnt_off00009f7f.bin
06c1a8aa57905c599b3f796a202d12a8fe68f93ac3726d101421bdb55cd7cb51
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F7F 10380 bytes