Malicious PDF — malware analysis report

Static analysis result for SHA-256 a33e91624a231222…

MALICIOUS

PDF

40.5 KB Created: 2020-08-30 07:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09146890af0af11e8d32d2ffd87f9dae SHA-1: 4db5582d62c19688ac899576980e1047e78f6ac3 SHA-256: a33e91624a231222e1dca379a32458abd3f9148e9bb48bc3d254694ed2300603
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of these links, 'https://ttraff.cc/wix?keyword=ti+89+manuals', points to known malicious redirector infrastructure. The document body appears to be malformed or obfuscated, but the presence of the malicious URL and the link farm strongly suggest a malicious intent, likely related to SEO manipulation or redirecting users to phishing or malware sites.

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/wix?keyword=ti+89+manuals
    • https://cdn.shopify.com/s/files/1/0431/5611/1520/files/cydia_free_without_jailbreak.pdf
    • https://cdn.shopify.com/s/files/1/0431/4329/9234/files/15139282147.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/vupokipesil.pdf
    • https://cdn.shopify.com/s/files/1/0434/7356/7901/files/69799838581.pdf
    • https://cdn.shopify.com/s/files/1/0431/3353/4357/files/bopobegimibudejipew.pdf
    • https://static.usrfiles.com/ugd/ade4e6_3910c4c7cc2c4828851be168e0f737b2.pdf
    • https://static.usrfiles.com/ugd/8d57bd_74e6a8ac0ebf41ecaeaa0e6efd955692.pdf
    • https://static.usrfiles.com/ugd/cafc24_fc050fa415a24687bb9806a98e9113d6.pdf
    • https://static.usrfiles.com/ugd/edb4a7_d8d5ba487f0f448ea5b60b77f9bf9d7e.pdf
    • https://static.usrfiles.com/ugd/4479ed_796894922af24f46836e56772af7a94f.pdf
    • https://static.usrfiles.com/ugd/39cb9d_860ef134b7924dc6ae98345deadc6973.pdf
    • https://static.usrfiles.com/ugd/b8c837_501406c151914eebbcf8f1ea013577cf.pdf
    • https://cdn.shopify.com/s/files/1/0437/5733/8776/files/prepper_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0435/6790/6979/files/72437572773.pdf
    • https://cdn.shopify.com/s/files/1/0430/8176/0935/files/jasiganafojetuzilikerer.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_off0000593c.bin
0bb69e8e4991c7eb5938a944cbb52eeab3fbafb21b80cfea44704aa212fd973b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x593C 4608 bytes
font_01_sfnt_off000068ab.bin
2b8bfebb84007b4a3df25920a304bc63844ac48a4357c7d6808c808a5058b97b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68AB 9248 bytes
font_02_sfnt_off00008764.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8764 4324 bytes

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