Malicious PDF — malware analysis report

Static analysis result for SHA-256 51e999913544376e…

MALICIOUS

PDF

45.3 KB Created: 2020-08-12 02:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa42180bfcb1aaa603d681ae8e796ba9 SHA-1: dc707bbfe72c11edd383375ea319a690f428b3cd SHA-256: 51e999913544376e61b721ec155f28759efc6e497dcef0ddaf9870c719b6eb85
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a manual for a GPS device. The document also features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector confirms the intent to lead the user to harmful content.

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/wb?keyword=gps%20skypatrol%20tt8750%20manual
    • http://files.myenterpriseinc.com/uploads/1/3/0/9/130969633/xomezonamomadipalar.pdf
    • http://files.en.220stopinjposevno.com/uploads/1/3/0/7/130739284/sujexisebatelil.pdf
    • http://dadamofu.ciucf.org/uploads/1/3/2/8/132814930/55909c38054e.pdf
    • https://cdn.shopify.com/s/files/1/0437/7313/2954/files/35517954343.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/10809735118.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/livros_de_candombl.pdf
    • https://cdn.shopify.com/s/files/1/0437/2329/2840/files/dukavetumemenalupazatabib.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5706/files/labekenufovu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3033/1040/files/55974719342.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4996/files/72747454892.pdf
    • https://cdn.shopify.com/s/files/1/0435/4516/5976/files/51130866651.pdf
    • https://cdn.shopify.com/s/files/1/0430/0963/8553/files/66880440530.pdf
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/15598178794.pdf
    • https://cdn.shopify.com/s/files/1/0439/4260/9051/files/analogies_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0437/1942/6197/files/gaming_discord_servers.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065f7.bin
4eb636b2663247fe663b3ef08bdd7b076738e31603905d8f247a8804eb53a810
pdf-font-stream PDF embedded font (sfnt) at offset 0x65F7 5704 bytes
font_01_sfnt_off00007961.bin
3fdfe2184200eb584380ef655d2ad9e11101d36c9c8ef1d1406d084c200bc55a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7961 14424 bytes