Malicious PDF — malware analysis report

Static analysis result for SHA-256 994a070711e94fde…

MALICIOUS

PDF

41.6 KB Created: 2020-09-07 10:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06a16a915e7001420526d3b78272efbf SHA-1: 924667396f54485ae3559f7b228827f7865d6650 SHA-256: 994a070711e94fdea36500d19ed12ebaba8ba85237e1a0a73d074fdae5abdc20
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.me/pify?keyword=avery+shipping+label+template+5167'. This URL is presented within the document body, disguised as a shipping label template, to lure users into clicking it. The document also contains a large number of embedded links to other PDFs hosted on Shopify, likely as part of an SEO link farm tactic. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.me/pify?keyword=avery+shipping+label+template+5167
    • https://cdn.shopify.com/s/files/1/0430/8962/5241/files/pojakobevowobezugi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6917/6985/files/fudupixugamupasefafevev.pdf
    • https://cdn.shopify.com/s/files/1/0463/1003/1517/files/74286822556.pdf
    • https://cdn.shopify.com/s/files/1/0435/9910/2115/files/ropiwukudowixeka.pdf
    • https://cdn.shopify.com/s/files/1/0434/4859/8678/files/20960250757.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunumegosuvuvorewufo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3870/2748/files/bengal_tiger_telugu_movie_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0434/4971/2807/files/kojazizibofufukiwura.pdf
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/68634926618.pdf
    • https://cdn.shopify.com/s/files/1/0431/0482/9602/files/nigumimibusepalava.pdf
    • https://cdn.shopify.com/s/files/1/0437/7994/8695/files/mathematics_for_economists_simon_blume_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/6562/9077/files/zegutexo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3873/5517/files/boosted_performance_kit_370z.pdf
    • https://static.usrfiles.com/ugd/17159d_3a559a8b455c43b699a54e2fd1ef44eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ce135a009d34bf4953121ac45d1f506.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_off00005f69.bin
0dfe557cd7957322632610658158d575d7e68e142fb0fd50e3e5043635d7c9b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F69 5932 bytes
font_01_sfnt_off00007391.bin
95fc33f8233ed11ae8a236bb418973b379499803eec1a67e1ce13309711ff288		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7391 10748 bytes

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