Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1adfaacc39a3706…

MALICIOUS

PDF

51.4 KB Created: 2020-08-13 23:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfd9375ab825dccd1b55c2853371fae2 SHA-1: 8c1209ae0a3db839c14a5e2595c130d6c134fb26 SHA-256: d1adfaacc39a3706ff6b71c7125a380c15a17a9ff3f1db92c2870274d3a05c81
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=char+qul+sharif'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and other links, suggesting the primary intent is to lure the user to a malicious site.

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.cc/pify?keyword=char+qul+sharif
    • http://daven.alanhuckleberry.com/uploads/1/3/0/7/130775320/39f2d87d.pdf
    • http://files.andrewbixler.com/uploads/1/3/1/4/131453053/ab784de509.pdf
    • http://files.jasmineforbuncombe.org/uploads/1/3/1/4/131406510/3735910.pdf
    • http://files.kadingoldberg.com/uploads/1/3/0/7/130776728/7e294.pdf
    • http://mezivojeg.nicholastoddshumate.com/uploads/1/3/0/7/130775934/debimebopobadamomop.pdf
    • https://cdn.shopify.com/s/files/1/0452/4628/3937/files/cfop_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/9220/5978/files/labotazuwolazirojasuwusug.pdf
    • https://cdn.shopify.com/s/files/1/0436/9291/6886/files/one_way_anova_example_problems_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0432/7754/9728/files/vedenuwukuxuxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8118/6971/files/dakibodeb.pdf
    • https://cdn.shopify.com/s/files/1/0438/0386/9346/files/area_and_perimeter_of_parallelogram.pdf
    • https://cdn.shopify.com/s/files/1/0430/6593/3973/files/24389320258.pdf
    • https://cdn.shopify.com/s/files/1/0429/4397/1484/files/genigux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9275/5111/files/5239799201.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_off0000682c.bin
ad1a396dd9e764ed38204c35da5172609f55371dfdf619a4999b2fbfc00bcbac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x682C 4888 bytes
font_01_sfnt_off000078c8.bin
4d7ce7bfa9834f4526e0c5d9f097489c0823d54cc2cdb352dede8ec3f7b48016		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C8 15676 bytes
font_02_sfnt_off0000a924.bin
13d69fdc6d2d483654649257956bc7e23eef7520dbfd7a9e1b40d32e757129e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA924 16788 bytes

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