Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb5d2cd3f2714db0…

MALICIOUS

PDF

44.4 KB Created: 2020-08-20 11:11:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66501b06024444672ef62813772fb5ca SHA-1: 43d4fa02ce0f8fa539738e501c4694e2bdfc3411 SHA-256: fb5d2cd3f2714db0f745f7cbf41fb9fd3a3bb7711af4623cf238371dd2c91cb5
120 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to manipulate search engine results, with a primary malicious redirector link disguised as a resume format for an accountant job. The document body, though heavily obfuscated, contains the malicious URL and numerous other URLs pointing to PDF files, likely for SEO manipulation. The primary malicious URL is https://ttraff.cc/pify?keyword=resume+format+for+accountant+job+pdf, which redirects to other 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.cc/pify?keyword=resume+format+for+accountant+job+pdf
    • http://files.willmutch.com/uploads/1/3/1/3/131380895/5002365.pdf
    • http://wevivod.neighboring-guide.com/uploads/1/3/1/6/131636947/vutoxerugoluwu.pdf
    • http://files.theyarnvault.com/uploads/1/3/2/7/132740805/3276293.pdf
    • https://cdn.shopify.com/s/files/1/0449/4888/1567/files/ugly_duckling_picture_story.pdf
    • https://cdn.shopify.com/s/files/1/0433/9499/0243/files/brain_tumor_detection_using_image_segmentation.pdf
    • https://cdn.shopify.com/s/files/1/0438/5246/4293/files/zimotobatotifusaxekixiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/ftse_all_share_index.pdf
    • https://cdn.shopify.com/s/files/1/0439/1131/5611/files/tofesujefebivukubekid.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/reaction_mechanism_of_alkenes.pdf
    • https://cdn.shopify.com/s/files/1/0431/6440/1818/files/87005113729.pdf
    • https://cdn.shopify.com/s/files/1/0430/7868/0730/files/82214503050.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/maxovesawesixopoxolupem.pdf
    • https://cdn.shopify.com/s/files/1/0430/5344/9367/files/merge_with_adobe_acrobat.pdf
    • https://cdn.shopify.com/s/files/1/0431/7069/3284/files/fagivilimubapoxufasivupu.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_off0000701f.bin
88a6109ad35e77ce2489411c28848baeadd2f9f6d7d128e3330ea1e498279875		 pdf-font-stream PDF embedded font (sfnt) at offset 0x701F 5492 bytes
font_01_sfnt_off000082b2.bin
b5987cb1b5b3ce7588e2e0dd6e9c837f90dab1c934be7ab043a9a77e931af27f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82B2 9996 bytes

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