Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f879110b324e7d…

MALICIOUS

PDF

52.8 KB Created: 2020-08-25 12:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6088f7c2249529f197e1e16b40ad08f SHA-1: 53b8b5102d80607b28ebf86a559fd61de700bd44 SHA-256: f0f879110b324e7d2f70c2e6b66339b2597963d846084609a7e95eab340d97ed
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a prominent link to a known malicious redirector, ttraff.com, which is disguised as a government apprenticeship marksheet validation. The document also features a large number of external links, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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.com/pify?keyword=apprenticeship+gov+pages+marksheet+validate
    • http://padurotut.incubator143.org/uploads/1/3/1/3/131379394/4068087.pdf
    • http://pikitin.goodnote.ca/uploads/1/3/0/8/130814328/kuferogo.pdf
    • http://dafolev.smokeandhoneylocalproducts.com/uploads/1/3/2/6/132682052/tuwitobivoj_jusixodul_xodujazadita_wotagarasom.pdf
    • http://files.scenicrimoptometrists.com/uploads/1/3/1/4/131407315/zikusuwe.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/temperature_sensing_devices.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0888/files/mewebepumuriwokel.pdf
    • https://cdn.shopify.com/s/files/1/0437/7182/2229/files/zipukas.pdf
    • https://cdn.shopify.com/s/files/1/0429/6831/8105/files/kovetixekiviruzoxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4392/9757/files/parallel_lines_worksheet_algebra_1.pdf
    • https://cdn.shopify.com/s/files/1/0432/7309/3288/files/71808694801.pdf
    • https://cdn.shopify.com/s/files/1/0431/7344/5788/files/12094822563.pdf
    • https://cdn.shopify.com/s/files/1/0447/9585/4997/files/blitzer_algebra_and_trigonometry_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/4809/8209/files/selozag.pdf
    • https://cdn.shopify.com/s/files/1/0428/3564/0487/files/diwali_festival_images_free.pdf
    • https://cdn.shopify.com/s/files/1/0450/4210/6518/files/municipal_solid_waste_to_energy.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_off00006517.bin
a2d7384946036dc63ba8e79f4678e9d44a65724a3947e9021b5adcc6009b804e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6517 5600 bytes
font_01_sfnt_off000077f2.bin
d3f9ac8dae6a929f4fb971d5b6869dd6b2dff0407753facde21110fce0ad7399
pdf-font-stream PDF embedded font (sfnt) at offset 0x77F2 16260 bytes
font_02_sfnt_off0000aa66.bin
ed9937e91153afe866a086f87cf7d6ab3ffaa03412575658b7e2ebb25172f529
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA66 8576 bytes