Malicious PDF — malware analysis report

Static analysis result for SHA-256 246b0dedd02d0838…

MALICIOUS

PDF

41.5 KB Created: 2020-08-24 16:08:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b552e30372c1a2e0fa7623af20e78402 SHA-1: 022bc09ee0974fdce38346863c8c193756dc66ea SHA-256: 246b0dedd02d08381b200fe36ea8750ef56f0561f0f55e264befac0fd2a60f43
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One of the primary URLs, 'https://ttraff.ru/pify?keyword=best+air+fryer+toaster+oven+consumer+reports', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to consumer reports and product names, likely as a lure to entice users to click the links. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=best+air+fryer+toaster+oven+consumer+reports
    • http://zojum.maveonlinestore.com/uploads/1/3/0/8/130814328/6758068.pdf
    • http://napevej.sweettopfarm.com/uploads/1/3/0/8/130813694/sebomajen-regatudilewu-jepanewofabezu-xofofovumi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9167/3763/files/tasop.pdf
    • https://cdn.shopify.com/s/files/1/0433/1791/9909/files/43773252673.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/53632986093.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2154/files/wovulowozofomedizem.pdf
    • https://cdn.shopify.com/s/files/1/0429/0985/9999/files/clash_of_clans_new_update_apk_mod.pdf
    • https://cdn.shopify.com/s/files/1/0430/5725/0455/files/58477872053.pdf
    • https://cdn.shopify.com/s/files/1/0428/5513/7447/files/wanodofomunob.pdf
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/21454997283.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/18428536385.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/6277553108.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/kuvavup.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_off00006485.bin
ff0740458ab512f680d4304973f3383847f0ca246e9b92446401a6f50c2ef357		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6485 5340 bytes
font_01_sfnt_off000076ab.bin
d09f51faf5278dff6dd2a3e17095ae8164bd9b4be36a254882ae7683a6922ed1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76AB 10184 bytes

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