Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c4963f1e8d465a7…

MALICIOUS

PDF

37.4 KB Created: 2020-08-23 00:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fee90d1d722b647ba9f052f7d2a81da SHA-1: 32fb3dd5b2fa2027c9566f83f46edd1af21617c6 SHA-256: 1c4963f1e8d465a714e09c11e4d02c42e5c965f851273a106e121454b72574c4
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=russian+possessive+pronouns+pdf'. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to 'Russian possessive pronouns'. The presence of multiple links to external PDFs, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted, but the primary attack vector is the redirection to a malicious site.

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.com/pify?keyword=russian+possessive+pronouns+pdf
    • http://files.csmmttaiwin.com/uploads/1/3/2/7/132710783/vowosevuxupagotazere.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0339/files/dolabolanububonegug.pdf
    • https://cdn.shopify.com/s/files/1/0429/1955/9335/files/egypt_pyramids_information.pdf
    • https://cdn.shopify.com/s/files/1/0429/7247/9647/files/66582693207.pdf
    • https://cdn.shopify.com/s/files/1/0438/7730/2427/files/saxepekafasomovifajopa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8517/6736/files/87440363232.pdf
    • https://cdn.shopify.com/s/files/1/0438/5007/2214/files/jisilena.pdf
    • https://cdn.shopify.com/s/files/1/0431/0266/6914/files/xipuka.pdf
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/naviw.pdf
    • https://cdn.shopify.com/s/files/1/0465/3236/2390/files/nitarimojotibelikafodigon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.pdf
    • https://cdn.shopify.com/s/files/1/0430/8746/2551/files/ordering_all_3_credit_reports.pdf
    • https://cdn.shopify.com/s/files/1/0432/8344/7966/files/82300399873.pdf
    • https://cdn.shopify.com/s/files/1/0429/5521/0905/files/delagigifeferulas.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_off00005578.bin
9c649cc830524c179459a053ce05ca13f855834ee58a76b7ce5ef930213e4626		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5578 5068 bytes
font_01_sfnt_off000066c8.bin
8aea796184e7de9a8a80500cfffd7103ce2ffa115004a047cc4eac407e57525b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66C8 9876 bytes

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