Malicious PDF — malware analysis report

Static analysis result for SHA-256 d536c93d311a89ba…

MALICIOUS

PDF

45.6 KB Created: 2020-09-03 09:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c015e69309ffc36efac8ee448ac0ddff SHA-1: 12f211c1ee3b95b62166a74dce3cde3f21bce21f SHA-256: d536c93d311a89baaf0850900250a7fafd834039dfa721deb8540f4ab07b8fd6
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.club/wix?keyword=afcat+question+paper+with+answer+key+pdf', is designed to lure users to malicious infrastructure. The presence of numerous other links to Shopify-hosted PDFs suggests a link farm or SEO poisoning tactic to improve the discoverability of the malicious lure. No scripts were extracted from this sample.

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.club/wix?keyword=afcat+question+paper+with+answer+key+pdf
    • https://cdn.shopify.com/s/files/1/0431/4451/1645/files/14745071919.pdf
    • https://cdn.shopify.com/s/files/1/0438/8149/6744/files/rorebepilotajidave.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2555/files/cognos_10_report_studio.pdf
    • https://cdn.shopify.com/s/files/1/0462/3043/8039/files/61948631994.pdf
    • https://cdn.shopify.com/s/files/1/0439/1400/2587/files/brainpop_login.pdf
    • https://cdn.shopify.com/s/files/1/0428/6709/7756/files/videoder_apk_free_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0428/8882/2950/files/7053935401.pdf
    • https://cdn.shopify.com/s/files/1/0438/0576/9888/files/advanced_medicinal_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0436/0352/5794/files/game_basara_2_heroes_android.pdf
    • https://cdn.shopify.com/s/files/1/0439/1079/1323/files/sidoneporowumusolamu.pdf
    • https://cdn.shopify.com/s/files/1/0459/6763/8695/files/54840629945.pdf
    • https://cdn.shopify.com/s/files/1/0429/7333/1609/files/bayonetta_alfheim_8_guide.pdf
    • https://static.usrfiles.com/ugd/7c30af_6fa74f4942714386a18e74b5fd90f163.pdf
    • https://static.usrfiles.com/ugd/b8c837_aeb2c51e61864088a723f52a2f679481.pdf
    • https://static.usrfiles.com/ugd/e98895_aee6b2e5cfc148fbb05efcb853cc142c.pdf
    • https://static.usrfiles.com/ugd/3b5dd9_52dce4ee829244b6b946b0a3a076dbb8.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_off000065ca.bin
b8644ccf2f2f7c954768049fcfd944538970478ccc2ec0709995458ded542370
pdf-font-stream PDF embedded font (sfnt) at offset 0x65CA 5464 bytes
font_01_sfnt_off00007863.bin
4184e74f388224c5a9660830103088b4929f598fb48860fedae2c105243ddcd4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7863 10316 bytes
font_02_sfnt_off00009b3b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B3B 4324 bytes