Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f30ef2164be1451…

MALICIOUS

PDF

44.5 KB Created: 2020-08-03 16:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f421c350143d3fbfb054fc54824f5dc5 SHA-1: 5754d199849853ec501c372a3b1476b343035ddd SHA-256: 8f30ef2164be14515509ce756e1589a6e57a720a765637463914d91a26bf480f
152 Risk Score

Malware Insights

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

The PDF document was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. It also contains a mass external PDF link farm, with many links pointing to Shopify domains, likely as a way to obscure the true malicious intent. The ML classifier also strongly indicated maliciousness. The document body contains text related to 'company profile structure pdf' and includes the malicious URL, suggesting a lure to trick users into clicking the link.

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=company+profile+structure+pdf
    • http://files.vislitsandbox.com/uploads/1/3/1/4/131437005/sotaxavud.pdf
    • http://files.salvationpromises.org/uploads/1/3/1/6/131637695/kisobogodewu.pdf
    • http://files.gabcmemphis.org/uploads/1/3/0/8/130814232/4527813.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/rimewigoguwid.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3678/files/81579640873.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/64805566759.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53940500656.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zigomotixiwututorevibalu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/who_s_your_daddy_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/jimmer_fredette_salary.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/13946196244.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lejozusuxawunulimedobina.pdf
    • https://cdn.shopify.com/s/files/1/0432/9465/4632/files/79049115945.pdf
    • https://cdn.shopify.com/s/files/1/0432/8764/2270/files/jozirevizurupokolixukoxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/1204/6491/files/7692411401.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_off00006f5a.bin
d0802221a5d6122887573cfd7a85726a059581ecf0fe11754026271eafa653e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5A 5308 bytes
font_01_sfnt_off0000815c.bin
456155ea78048310e76c501a0ead18d75a03c317cdaafd11402b73d7e6fca77a
pdf-font-stream PDF embedded font (sfnt) at offset 0x815C 10612 bytes