Malicious PDF — malware analysis report

Static analysis result for SHA-256 867753fa8161c633…

MALICIOUS

PDF

61.4 KB Created: 2020-08-21 19:24:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81ffe9671879d37fa87b36f7cb08f88d SHA-1: 915ea345dc428f85d4efaf3fcae790ba9a313690 SHA-256: 867753fa8161c63357c57dc555ff384f1e44ed4fc6ba29942750a38bbf1e7ab5
128 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 pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, with numerous links to external PDFs, including one hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure to a malicious site disguised as a download. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further supports the social engineering aspect of this attack.

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.com/pify?keyword=amar+ujala+epaper++pdf
    • http://files.hairofthedog.shop/uploads/1/3/1/6/131636689/vafeneweb_kokinunefu_labunijagadejof.pdf
    • http://files.tnlsfranklin.com/uploads/1/3/0/9/130969148/6434410.pdf
    • http://sikog.churchesofchrist.com/uploads/1/3/0/8/130874431/tuxozib_lenezeterawijak_munabuvo.pdf
    • http://files.healthyhomespestcontrol.net/uploads/1/3/1/1/131163683/2816201.pdf
    • https://cdn.shopify.com/s/files/1/0431/3517/2770/files/belageddu_yara_mukava_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0436/9943/7721/files/simcity_cheat_code.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/auditor_s_report_definition.pdf
    • https://cdn.shopify.com/s/files/1/0430/2998/7489/files/nirixavupitegidume.pdf
    • https://cdn.shopify.com/s/files/1/0431/5598/0439/files/68271768216.pdf
    • https://cdn.shopify.com/s/files/1/0437/6081/2190/files/kenmore_110_washer.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wakudegebemufajetexu.pdf
    • https://cdn.shopify.com/s/files/1/0438/8572/3816/files/41269075238.pdf
    • https://cdn.shopify.com/s/files/1/0433/4885/2891/files/kokeromiviladegesude.pdf
    • https://cdn.shopify.com/s/files/1/0431/4021/9047/files/edhesive_assignment_5_array_statistics_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/vopaxopoguzadexi.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/
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/auditor_s_r

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007633.bin
59250b8d1b9710249c242796bc444c40d4bd51f4b0274e8ef38d7706ea672972		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7633 5076 bytes
font_01_sfnt_off0000875d.bin
d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x875D 3720 bytes
font_02_sfnt_off000092c1.bin
1c044c7ad7aa4d96f6d8cfd968e9d7b935f7089baadcf233849add8501b39f3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92C1 10288 bytes
font_03_sfnt_off0000b621.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB621 16164 bytes
font_04_sfnt_off0000cb74.bin
d740d50402d8e1398ba1f706a77069b305ebce266ba7260e2392e691802fc6c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB74 7720 bytes

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