Malicious PDF — malware analysis report

Static analysis result for SHA-256 8350c3a9e132039f…

MALICIOUS

PDF

44.4 KB Created: 2020-08-02 21:07:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47a1bf4c407d89bd6c6e8c98db7bbdb3 SHA-1: 4cf5dee758911c73246a56b481ab9ffa566fd0af SHA-256: 8350c3a9e132039f893aa4c559315f30e57e160573475495447ae1cdf02e3cea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. It also features a large number of links to other PDFs hosted on Shopify, likely as part of an SEO link farm to obscure the malicious intent. 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.com/pify?keyword=getting+input+in+python
    • http://files.ruggedmountaintaxidermy.com/uploads/1/3/1/8/131856492/5585303.pdf
    • http://files.laika-the-space-dog.com/uploads/1/3/0/7/130739488/9166858.pdf
    • http://files.ceramicsmaui.com/uploads/1/3/1/4/131453917/2628574.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/3142/0319/files/jikajagixiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71135401618.pdf
    • https://cdn.shopify.com/s/files/1/0433/3587/6776/files/dezoke.pdf
    • https://cdn.shopify.com/s/files/1/0429/7955/7535/files/veduk.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1031/files/70800967085.pdf
    • https://cdn.shopify.com/s/files/1/0435/4709/9290/files/bunamusisixomuxoka.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1480/files/xironizeluwadimawale.pdf
    • https://cdn.shopify.com/s/files/1/0430/3503/3757/files/40331832548.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/mald_urban_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0430/1111/3123/files/resufivurofefilogu.pdf
    • https://cdn.shopify.com/s/files/1/0435/0584/4390/files/jump_the_shark_gif.pdf
    • https://cdn.shopify.com/s/files/1/0437/0723/6503/files/gelabizubezodafuvuzibaw.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_off00006344.bin
11475a82ce8523e9d780433dc6a96372e2d5cd73a504cb9eba521fee0819bd22
pdf-font-stream PDF embedded font (sfnt) at offset 0x6344 4580 bytes
font_01_sfnt_off000072e8.bin
784a1ec9896541be4ed4f4d8f0de5d5012dece18ffc3c10c827f694c29669ef2
pdf-font-stream PDF embedded font (sfnt) at offset 0x72E8 10600 bytes
font_02_sfnt_off00009709.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9709 4324 bytes