Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb842bede83f202e…

MALICIOUS

PDF

42.1 KB Created: 2020-08-11 22:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4eb1319bf10ac5e5ebb1fc73f9cc1c8a SHA-1: a8e9030ea1a8c7a190196dc478c8b649a5c113bf SHA-256: cb842bede83f202e995053b4e2081e3795b190ed5cd8893849bed39adfe55ec1
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=as+is+bill+of+sale+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the lure text 'as is bill of sale pdf' and the malicious URL, suggesting a phishing or scam attempt.

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=as+is+bill+of+sale+pdf
    • http://files.birdingmoments.com/uploads/1/3/1/3/131398141/2827415.pdf
    • http://files.vibrantlife101.com/uploads/1/3/1/3/131383657/tumagujewokezogekis.pdf
    • http://files.battlecreekendo.com/uploads/1/3/0/7/130775997/4503997.pdf
    • http://vizis.rebeccavocalathlete.com/uploads/1/3/0/7/130738943/ec982a915f6.pdf
    • http://files.amandatolentino.com/uploads/1/3/0/7/130776485/8097920.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kovogosiwe.pdf
    • https://cdn.shopify.com/s/files/1/0437/1742/7352/files/web_portal_development_proposal.pdf
    • https://cdn.shopify.com/s/files/1/0429/8289/9871/files/xetefumoguromexot.pdf
    • https://cdn.shopify.com/s/files/1/0429/2195/1391/files/calculus_of_a_single_variable_larson.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9430/files/zamapajikilosowumufi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/antimicrobial_activity_of_allium_sativum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/woziki.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1932/files/12297080281.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38684703775.pdf
    • https://cdn.shopify.com/s/files/1/0430/9699/8048/files/nevukudaponolut.pdf
    • https://cdn.shopify.com/s/files/1/0430/9132/9173/files/arvo_part_fratres_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/2341/8019/files/romagesisejowowe.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_off000067a0.bin
7f2178d33b621353ee079ea63ac27c3feadb4d89b4d048a2c17b9c62098c3618		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A0 5068 bytes
font_01_sfnt_off000078e3.bin
b75c3e959900e7b300f886ea8bd4a5b8780929d621fdbba8743e9a498dca756d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78E3 10152 bytes

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