Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbb6dd36e910ab22…

MALICIOUS

PDF

44.0 KB Created: 2020-08-17 05:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bf1eeed6d95fcf6435b4079138a8e78 SHA-1: 2d7be62428afdc071700640e8de5a7d7b0dce3c4 SHA-256: cbb6dd36e910ab223ff7561a815392ceb7b5bd94809529d55b6edaf5b291fc45
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to 'https://ttraff.cc/pify?keyword=esl+speaking+board+games+pdf'. This URL is likely used to redirect users to malicious content. The document also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic to distribute the malicious PDF. No scripts were extracted from this sample.

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=esl+speaking+board+games+pdf
    • http://mijugebil.exeterforum.org/uploads/1/3/1/1/131163599/dibadusofesofoxonil.pdf
    • http://fokariwe.crrhcc.com/uploads/1/3/2/6/132682467/bajidokal.pdf
    • http://files.adivasi.sk/uploads/1/3/0/8/130814339/wolobi.pdf
    • http://lijizuse.just-surveys.com/uploads/1/3/1/4/131453247/d3309b197.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/pirujisomad.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/98704897892.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5611/files/vagarowepaxanubiwiribewa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4329/files/12414486026.pdf
    • https://cdn.shopify.com/s/files/1/0437/0658/1147/files/css_transform_origin.pdf
    • https://cdn.shopify.com/s/files/1/0435/9543/2099/files/inverse_2x2_matrix.pdf
    • https://cdn.shopify.com/s/files/1/0429/5901/2006/files/skyrim_special_edition_combat_mods.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/safulupok.pdf
    • https://cdn.shopify.com/s/files/1/0433/9869/3022/files/database_systems_an_application_oriented_approach.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/32927274089.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_off00006e18.bin
9e8431a711ded5149d1daf1a28ed18cad32fb11d170a2149c1feff8e619f2101		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E18 5520 bytes
font_01_sfnt_off000080bc.bin
d15fd9fef372d915fe4d789ab88fff035cda02ac9a6912e438f2c7902b3aeca4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80BC 10128 bytes

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