Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfe666df3369ea89…

MALICIOUS

PDF

57.3 KB Created: 2020-09-08 12:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 855a1d7534e9ae73cbf4e3910a648a2b SHA-1: 29fba7041a058a5fe42e8b57f4853db26e816431 SHA-256: cfe666df3369ea8929e8531d2621f551d0e6b186c0d567571bd4dad700874901
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=french+to+english+dictionary+apk+free'. This URL is presented within the document body, disguised as a download for a French to English dictionary. The file also contains a large number of external PDF links, many hosted on cdn.shopify.com and static.usrfiles.com, suggesting a link farm or SEO poisoning attempt. The primary malicious intent appears to be redirecting the user to the malicious ttraff.ru domain.

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=french+to+english+dictionary+apk+free
    • https://static.usrfiles.com/ugd/97aff7_4f8930ec051e4c30802ce03cdf4d6f94.pdf
    • https://static.usrfiles.com/ugd/5ad03d_630ccfe0de804749b26f2d5ca71a14a1.pdf
    • https://static.usrfiles.com/ugd/b0c717_cfa35b7a64e546abbc49d178cf80059c.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/50757765587.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5523/files/65884828354.pdf
    • https://cdn.shopify.com/s/files/1/0434/4630/4920/files/51241996752.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rosetotirumeza.pdf
    • https://cdn.shopify.com/s/files/1/0432/7872/9374/files/fediaf_nutritional_guidelines.pdf
    • https://static.usrfiles.com/ugd/21e6f2_44970310c92f4a599855605eb8eff71f.pdf
    • https://static.usrfiles.com/ugd/38955b_f12ee0805fc043eeb367e239180595cb.pdf
    • https://static.usrfiles.com/ugd/23b571_039e2b2c803f45289f93691f7f7ae17b.pdf
    • https://cdn.shopify.com/s/files/1/0428/1666/7814/files/pamatujamepufujeketojox.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1547/files/electro_dynamics_physics.pdf
    • https://cdn.shopify.com/s/files/1/0431/0682/8454/files/21064609618.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/negagopogazo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6171/3813/files/gotokokobunok.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005332.bin
a412cb2c2541650a7f13ec524238ee85bebd03b460ae5e54095d71a154169e1f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5332 15364 bytes
font_01_sfnt_off00008481.bin
4715bf166d816fc4e8bd6bc15a7fa3e06af38f08c08c6486a346a86e7cb052c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8481 5540 bytes
font_02_sfnt_off00009765.bin
38bf2c4517178b648a6c475b87d36e8b1df7d8c0d92a48a83583ad871f054ad6
pdf-font-stream PDF embedded font (sfnt) at offset 0x9765 13080 bytes
font_03_sfnt_off0000c14e.bin
cf96631f784379724622ae63351c9d35a5a19c08ac2d66cb149eb318896b45b9
pdf-font-stream PDF embedded font (sfnt) at offset 0xC14E 16416 bytes