Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a8aa261d105f73c…

MALICIOUS

PDF

44.4 KB Created: 2020-08-31 11:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40ae77818bbcbd91c0546d61dace11e8 SHA-1: bc35acb72f566c19b380a438320c450eda89c8ac SHA-256: 3a8aa261d105f73cc36a7adf05a8cb26938134f55f9730317408650687caaff5
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector link. The document body, though heavily obfuscated, contains text related to 'Iata dangerous goods manual 2018' and the malicious URL, suggesting a lure. The presence of a large number of external PDF links hosted on Shopify indicates a potential link farm or SEO manipulation tactic. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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/wix?keyword=iata+dangerous+goods+manual+2018
    • https://cdn.shopify.com/s/files/1/0431/0558/3266/files/vulel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mekokagowofulagifofid.pdf
    • https://cdn.shopify.com/s/files/1/0429/2496/6044/files/benim_hocam_tyt_corafya_ders_notlar.pdf
    • https://cdn.shopify.com/s/files/1/0432/4936/9252/files/tafunadamosej.pdf
    • https://cdn.shopify.com/s/files/1/0434/5557/8273/files/suvixitoxebazukov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zobirunutopuwipigodilig.pdf
    • https://cdn.shopify.com/s/files/1/0436/2174/4803/files/23861589647.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2919/files/84219312083.pdf
    • https://cdn.shopify.com/s/files/1/0431/3484/5079/files/57878259454.pdf
    • https://static.usrfiles.com/ugd/1decf9_f152dd5a1a554ce0bcf814c269872b5f.pdf
    • https://static.usrfiles.com/ugd/87b9a8_ef1af6e8e063468da86040de37999823.pdf
    • https://static.usrfiles.com/ugd/73f3b0_8e53e3aef71c41a98d36fef9e0ae3043.pdf
    • https://static.usrfiles.com/ugd/16a96a_a3828bce4d79451a9bc060fae489a8e3.pdf
    • https://static.usrfiles.com/ugd/c618e9_1b41b85caff445f89636992de4289be3.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_off000061cb.bin
aa20e3bedc34158ac1f6b48f2f8459d41f8b85169e66c211d503b78cdbe42c50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61CB 5600 bytes
font_01_sfnt_off000074b5.bin
f25fd9299703d23c39cd1e277008b3ab119905db0a90871f88d9239cb32230a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B5 14400 bytes

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