Malicious PDF — malware analysis report

Static analysis result for SHA-256 350c7177e12fa3b3…

MALICIOUS

PDF

48.7 KB Created: 2020-09-09 11:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66422edcfe645612ba592d4b80772a56 SHA-1: a20da90b76c8295da33e4c1655e16b6330f69d0a SHA-256: 350c7177e12fa3b30d10e4963865bac6d1f978c47d59f7e9d2793dee25bf121a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious Link T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with one prominent link pointing to a known malicious redirector. The document body also contains a lure related to 'Steam slow but internet fast' and explicitly instructs the user to disable security software, indicating a social engineering attempt to bypass defenses. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer malicious intent.

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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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.me/pify?keyword=steam++slow+but+internet+fast
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/gegofinazotem.pdf
    • https://cdn.shopify.com/s/files/1/0431/5198/2754/files/poribumotosozusikerelow.pdf
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/nigexoxukavapusezelefiko.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/61473214567.pdf
    • https://cdn.shopify.com/s/files/1/0429/8443/9971/files/bofikixibuvebowumakivuxem.pdf
    • https://cdn.shopify.com/s/files/1/0437/5874/7800/files/sololearn_certificate.pdf
    • https://static.usrfiles.com/ugd/110ef3_984085b262a242c2b54e0531374e49a0.pdf
    • https://static.usrfiles.com/ugd/aa14a9_350fcfc83b7e4c8c86c79379ded5b250.pdf
    • https://static.usrfiles.com/ugd/e2c250_69830e1b32fb457ebc165dcaf33561fd.pdf
    • https://static.usrfiles.com/ugd/5f5755_cea0083c0dd84e588197407aaab69262.pdf
    • https://static.usrfiles.com/ugd/04e6f9_b9f739ad063b42f0bf3f03aacbc41591.pdf
    • https://static.usrfiles.com/ugd/4b68be_0a413a8906d6448a959771d428bc9c48.pdf
    • https://static.usrfiles.com/ugd/81d6a4_c24e0c07c31045dcb6f2532f98df3832.pdf
    • https://static.usrfiles.com/ugd/4ae4db_44e4cf6e666b47228f95290ff1419522.pdf
    • https://static.usrfiles.com/ugd/4d548e_6d82ec1ef78448a7ac0aff84a48d9b97.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_off00006cbf.bin
292de3778e5e1706e741683682ec99417473171dc99513cd617cd47c97d43496
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBF 5248 bytes
font_01_sfnt_off00007e91.bin
41ab783bf053930b85e427bf9f407add6abc5ac725820823298afe763969f429
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E91 9980 bytes
font_02_sfnt_off0000a0e6.bin
2ec7b87bc56cc33d32d243ecb23d136f13b6601874843951a4ee16d7972f48d9
pdf-font-stream PDF embedded font (sfnt) at offset 0xA0E6 16116 bytes