Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab23a1b988b6a9d…

MALICIOUS

PDF

42.9 KB Created: 2020-08-04 18:33:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61914942784e37f0dbb7a843e8584c2b SHA-1: 83331cfbe9f375b988f53f16465017e60fb616bc SHA-256: dab23a1b988b6a9dbab50a55f30682cfe9a401cae4b98e5d1e2f818e777e43b3
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO poisoning. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=schulferien+baden+w%25C3%25BCrttemberg+pdf'. The document body text, though heavily obfuscated, contains the same search query, indicating a lure to trick users into clicking the malicious link. 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.ru/pify?keyword=schulferien+baden+w%25C3%25BCrttemberg+pdf
    • http://files.farrellheating.com/uploads/1/3/0/7/130740536/koxinelevasumufek.pdf
    • http://files.matthieuferey.com/uploads/1/3/1/4/131438557/pevodo.pdf
    • http://files.nalinikrishnankutty.com/uploads/1/3/0/8/130874128/mewajuluxojuvafox.pdf
    • https://cdn.shopify.com/s/files/1/0433/1424/9886/files/gegowamo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9055/8620/files/lexamen.pdf
    • https://cdn.shopify.com/s/files/1/0430/6580/2903/files/rabaxanelegeminuxisem.pdf
    • https://cdn.shopify.com/s/files/1/0432/3016/7202/files/69863306521.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3873/files/16254866341.pdf
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/53823589363.pdf
    • https://cdn.shopify.com/s/files/1/0440/3753/7942/files/wokagisez.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/6057294230.pdf
    • https://cdn.shopify.com/s/files/1/0431/5047/5413/files/nivenozutimejivusopudapot.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7291/files/25466025784.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jatebilebasa.pdf
    • https://cdn.shopify.com/s/files/1/0440/8072/6168/files/17134776846.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005931.bin
b0130bbd4cc16040c399270b953d85bb742945df19098ee2133b5f1970308791		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5931 5616 bytes
font_01_sfnt_off00006bf3.bin
d9a3c8b42ac79c4bda842c1de9b37145b1ad304b3e62b3a77e3a1787b7b924fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF3 10652 bytes
font_02_sfnt_off00008ed9.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED9 4324 bytes

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