Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c2630ed144fd530…

MALICIOUS

PDF

45.3 KB Created: 2020-08-03 11:39:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9260f37bc31d7221608398a97034617 SHA-1: 0ecc4ce917aaede653c8ba7faf9add1dae6c5da5 SHA-256: 5c2630ed144fd530d1f23fef2619c72e1615fa60ce539b12748b9e0c645bbdc6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.cc/pify?keyword=python+interview+questions+tutorialspoint+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect users to malicious infrastructure. The ML classifier strongly indicates maliciousness.

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=python+interview+questions+tutorialspoint+pdf
    • http://files.sandcastletreasures.com/uploads/1/3/0/7/130739918/952efea14f99d.pdf
    • http://files.theoptimalageingprogramme.net/uploads/1/3/2/6/132681479/2608561.pdf
    • http://files.hlcaurora.org/uploads/1/3/0/8/130874411/23c8f045.pdf
    • http://files.faithathome.com/uploads/1/3/1/4/131406082/mipiwu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2758/6457/files/95070632469.pdf
    • https://cdn.shopify.com/s/files/1/0430/3470/6069/files/dalarobukupewarisani.pdf
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/13725223277.pdf
    • https://cdn.shopify.com/s/files/1/0431/6597/4690/files/48883852455.pdf
    • https://cdn.shopify.com/s/files/1/0434/9850/4354/files/mamorin.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/fodanenelupunolopuzif.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1954/files/598627557.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/xurekusudupedimuxutaseki.pdf
    • https://cdn.shopify.com/s/files/1/0431/5555/4458/files/6195404033.pdf
    • https://cdn.shopify.com/s/files/1/0432/4130/8320/files/zepadivaluwososonafenenad.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3287/files/76025395941.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_off000070d5.bin
cb061397f4f1fd4197e2020aea1c64a1e0bca5b02cd0d8ba7aa36b0ccf87ffd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x70D5 5512 bytes
font_01_sfnt_off000083a9.bin
78243bf212e030e26747af99dc8514302523c2d16709ef293afe52514c29ef02
pdf-font-stream PDF embedded font (sfnt) at offset 0x83A9 10888 bytes