Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ddec7f5037e72ac…

MALICIOUS

PDF

44.9 KB Created: 2020-08-13 21:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fc154ce08f3c7e95be445247f260a94 SHA-1: 51a88bc20a04830478bd3c4661b6b201d53a0a3b SHA-256: 2ddec7f5037e72ac9e3e311c8b9212043f00ddbb8d41c6365e3f70997d6a0e37
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the string 'Bochen 3296 datasheet' and the malicious URL, suggesting a lure to trick the user into clicking the link. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/pify?keyword=bochen+3296+datasheet
    • http://files.harrisondomain.org/uploads/1/3/1/3/131380875/1555419.pdf
    • http://files.silverweed.ca/uploads/1/3/1/3/131380627/bd9752449117b4.pdf
    • http://files.tinagutierrezartsphotography.com/uploads/1/3/0/7/130775383/remax-taxopugazaledu-fuluxibejurifuj-lavosiraleset.pdf
    • http://files.brcwrt.com/uploads/1/3/2/6/132681749/9731105.pdf
    • http://files.trondheimbrukskunst.com/uploads/1/3/1/3/131380308/lakodebiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/4638/8380/files/67585701398.pdf
    • https://cdn.shopify.com/s/files/1/0430/6783/4517/files/print_advertising_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8330/files/navavuzelabuninobomoba.pdf
    • https://cdn.shopify.com/s/files/1/0438/7382/9032/files/dark_souls_2_victors_stone.pdf
    • https://cdn.shopify.com/s/files/1/0436/0906/3586/files/mckinsey_7s_framework_case_study.pdf
    • https://cdn.shopify.com/s/files/1/0439/1203/6520/files/75404449407.pdf
    • https://cdn.shopify.com/s/files/1/0432/4756/7010/files/chinua_achebe_things_fall_apart.pdf
    • https://cdn.shopify.com/s/files/1/0437/3859/5482/files/20147065535.pdf
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/anne_of_green_gables_vk.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/sanokipevigigewunugikomem.pdf
    • https://cdn.shopify.com/s/files/1/0430/9542/5191/files/ruzejupaxawotuzuzokela.pdf
    • https://cdn.shopify.com/s/files/1/0433/0441/9478/files/9027767490.pdf
    • https://cdn.shopify.com/s/files/1/0432/0939/2285/files/baderuxifegamus.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/1/0430/9542/5191/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c94.bin
9e8301a812e0963997f2c69c75bfd39e7fcc44359b8a43baf6657440e065e79d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C94 2960 bytes
font_01_sfnt_off00005704.bin
e3991199bea6d2017b6efb5b1bc90c4c8c341d4b06f63006694dcbe7fd95a1ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5704 5552 bytes
font_02_sfnt_off000069ca.bin
a210df6fafe7cf5dc5f4ba8523dd2672aff03aa6293accb08c42470dd47ed9c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69CA 10864 bytes
font_03_sfnt_off00008f3d.bin
a56c3305eae8c274f9530afc53b94bb11aea5b2e4106fccae25e6adbba8aa2c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F3D 16260 bytes

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