Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ba516b441f443bf…

MALICIOUS

PDF

44.0 KB Created: 2020-08-31 02:07:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77d4d8a8f5a4cc92a8e031cb06abdb47 SHA-1: 03e1bd260ed5762b11a19fe886fbfa91bd3a788c SHA-256: 4ba516b441f443bf9da5c9d95a32a01ec69c7e3faf957f9cdeecbd74f67a838d
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of embedded links, many pointing to Shopify. The document body also contains a call-to-action phrase, suggesting a lure to download something. The primary malicious IOC is the ttraff.ru URL, which is identified as a malicious redirector.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=igun+pro+mod+apk
    • https://cdn.shopify.com/s/files/1/0436/2646/3385/files/tixosodasomivafoposu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/vininufenafugejabalamu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gidawibozifuniji.pdf
    • https://cdn.shopify.com/s/files/1/0438/9719/2603/files/sensory_evaluation_of_food_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/93559882986.pdf
    • https://cdn.shopify.com/s/files/1/0430/1789/6089/files/dovofisalugefovivixi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0455/8488/files/96213092892.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/jotamobu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6157/files/mechanisms_of_cardiac_arrhythmias.pdf
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/past_tense_worksheets_for_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0431/1390/6327/files/jakomeko.pdf
    • https://cdn.shopify.com/s/files/1/0433/3853/0965/files/46943873521.pdf
    • https://cdn.shopify.com/s/files/1/0462/6707/2669/files/18368799749.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gamusuzojikifikukudubug.pdf
    • https://cdn.shopify.com/s/files/1/0431/3789/2509/files/43484006452.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_off00006584.bin
1829e2ca655ac5a77d23796c15ca948f61e2c598593fe82dc07aa45bf4bf7dcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6584 5068 bytes
font_01_sfnt_off000076ad.bin
178b2cb6e7afd6dae94f26f63624529a770b8ccb8b7cb960d0d97513a228608e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76AD 17720 bytes

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