Malicious PDF — malware analysis report

Static analysis result for SHA-256 abac9b3a52b2a80c…

MALICIOUS

PDF

53.3 KB Created: 2020-08-11 00:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7489b9edb5656855fdcb869e8de63473 SHA-1: d08572a449de492e190c90d66240db14997d72e5 SHA-256: abac9b3a52b2a80c46b28588e2e1017af201b377f01b70d58bc071efa96e4d74
120 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, many of which point to external resources. One critical heuristic firing indicates that the document links to known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=inflammation+atherosclerosis+and+coronary+artery+disease+pdf`. The document body itself is heavily obfuscated but contains references to this URL and numerous other Shopify-hosted PDF files, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites. The primary intent appears to be redirecting users to potentially harmful content.

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=inflammation+atherosclerosis+and+coronary+artery+disease+pdf
    • http://nodix.firstfirebirds433.com/uploads/1/3/0/7/130740025/jumupivimewofatet.pdf
    • http://files.grewbuilding.com/uploads/1/3/0/8/130874204/6904644.pdf
    • http://files.ckc3.org/uploads/1/3/1/4/131452977/nisataxo-semulatusijoter.pdf
    • https://cdn.shopify.com/s/files/1/0431/1613/4562/files/8979582020.pdf
    • https://cdn.shopify.com/s/files/1/0440/1581/2766/files/asperges_me_domine.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8516/files/sijoxoroliwavotepebelab.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/68012058718.pdf
    • https://cdn.shopify.com/s/files/1/0428/1748/7011/files/xanubolane.pdf
    • https://cdn.shopify.com/s/files/1/0435/7334/6463/files/fundamentals_of_thermodynamics_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/samsad_english_to_bengali_dictionary_file.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/zawupa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/kudawasujofuxilezosob.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/pejiragezesomamonuburiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9610/files/ken_fisher_net_worth.pdf
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/1074188999.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1632/files/35594191113.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_off000083fe.bin
a149a27eb4183121705203b474153cfa2f4f53f68dc7e24df0d39349198859d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x83FE 5220 bytes
font_01_sfnt_off00009587.bin
5290d4e598478453d5981381a96992e6eedabd975e5dbe088d4b79f5dbb2c5af
pdf-font-stream PDF embedded font (sfnt) at offset 0x9587 10796 bytes
font_02_sfnt_off0000b991.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xB991 4324 bytes