Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8192c77fc7e3c78…

MALICIOUS

PDF

49.1 KB Created: 2020-08-25 01:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 319a4f018d51ac6454ca8777bd5012c2 SHA-1: e18a4c03f4fc3090d7b47c69743d4e85d096bcb0 SHA-256: f8192c77fc7e3c78e099c2e0163e927ef24b127c7679428cd021372c1ee5880e
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm. One of these links, https://ttraff.ru/pify?keyword=ancient+egypt+medicine+pdf, is identified as a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves redirecting users to malicious infrastructure through this extensive link farm.

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.ru/pify?keyword=ancient+egypt+medicine+pdf
    • http://files.intermountainite.com/uploads/1/3/0/7/130776206/bekopokafaworamokeke.pdf
    • http://files.wichitatoyrun.com/uploads/1/3/1/0/131070633/5355159.pdf
    • http://files.katetenenhouse.com/uploads/1/3/1/4/131454883/1395416.pdf
    • http://files.theconferencereview.com/uploads/1/3/2/8/132814906/bepimas.pdf
    • https://cdn.shopify.com/s/files/1/0435/3844/8548/files/minecraft_0._13._0_servers.pdf
    • https://cdn.shopify.com/s/files/1/0427/4873/9740/files/xokozim.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/bowaze.pdf
    • https://cdn.shopify.com/s/files/1/0437/2935/4906/files/aptitude_and_reasoning_tricks.pdf
    • https://cdn.shopify.com/s/files/1/0436/3531/0752/files/go_launcher_ex_themes.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1908/files/29767706502.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/baworijugofizufetakeromuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/1663/4016/files/cantilever_beam_problems.pdf
    • https://cdn.shopify.com/s/files/1/0435/6574/4287/files/yahoo_mail_attachment_error.pdf
    • https://cdn.shopify.com/s/files/1/0432/2561/2450/files/kixugesegus.pdf
    • https://cdn.shopify.com/s/files/1/0432/6119/8491/files/mejuguxavabuji.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8281/files/99281735187.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_off000075e2.bin
8db07d5a997bfe83eaf3175d1efc816f425c45dc035f8d4ffe17309b2fd68811		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E2 4728 bytes
font_01_sfnt_off000085e5.bin
cf420eb77024aa1cfbf976cfa98bf8bdfe930dfb0a0e5d3e3c1ee51de759c1ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85E5 10372 bytes
font_02_sfnt_off0000a91a.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA91A 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.