Malicious PDF — malware analysis report

Static analysis result for SHA-256 442caf3809c9d010…

MALICIOUS

PDF

41.5 KB Created: 2020-08-30 15:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c53467ba2db11f80f1f918c304443e71 SHA-1: a4d7f3d00209758d3f0cf3ad05deb8895c58c7b7 SHA-256: 442caf3809c9d0109d8f6508ba02225e1cfe61fe17a72d5017c2f6ff785ef75a
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'SE_INVOICE_LURE' suggests the document's content is designed to trick the user into clicking these links, likely leading to a phishing or malware download site. The primary malicious URL identified is ttraff.ru.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wix?keyword=maths+bordas+terminale+s+correction
    • https://cdn.shopify.com/s/files/1/0439/7711/3758/files/age_of_empires_2_free_microsoft.pdf
    • https://cdn.shopify.com/s/files/1/0428/1230/9671/files/retegu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3759/7596/files/goromar.pdf
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/18402673631.pdf
    • https://static.usrfiles.com/ugd/b8c837_3628b14fd6614a71ad1472d7c8846ff4.pdf
    • https://static.usrfiles.com/ugd/b8c837_75af4c98b558483ab5b7d42cc283ab75.pdf
    • https://static.usrfiles.com/ugd/2c8d66_cff10fdabd484e5ab4ff8207c22a6394.pdf
    • https://cdn.shopify.com/s/files/1/0438/1769/7437/files/fuvavopewepemulijivexarol.pdf
    • https://cdn.shopify.com/s/files/1/0430/1147/3571/files/livizagibapoxes.pdf
    • https://cdn.shopify.com/s/files/1/0434/6970/1280/files/snap_food_stamps_texas_income_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0432/4956/5853/files/furujexejurulavof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/6067054544.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/befuxaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/acca_f9_book.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_off00006523.bin
6014ddc6bc487b7b0cfcca2925198e4020d1734aa68ca32b6166b483dbfd2a2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6523 5324 bytes
font_01_sfnt_off00007713.bin
fc32ecaa0ff447e397875713c1704c4861cf719789640413fffd2cb40e789632		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7713 9980 bytes

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