Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f2c68aab9ade4de…

MALICIOUS

PDF

40.5 KB Created: 2020-08-30 17:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f683335b5b3b4d9f96f45b890069a6c4 SHA-1: f7aeb755b8bb1b389bf2ba0ec1d9e089851f4d0d SHA-256: 6f2c68aab9ade4de1f4794460b6720752773921946bef3fa17e5a568cf9a8a30
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The ML classifier also strongly indicated maliciousness. The primary goal appears to be redirecting users to potentially harmful content through a link farm strategy.

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.link/wix?keyword=manual+de+conservacion+de+alimentos+rahman
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/4190/5057/files/sense_of_direction_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/cause_and_effect_worksheets_2nd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0436/0614/7235/files/set_layout_background_programmatically_android.pdf
    • https://cdn.shopify.com/s/files/1/0440/8534/6469/files/newest_android_version_2019.pdf
    • https://static.usrfiles.com/ugd/b8c837_a3a449a4cffc487d994f167b764bb8c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_74942d65a4a642b8b780e8b884f61fd6.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_93a418953e8e4ede980b8f53099274c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f7a01b5f5764d67b1361fb8fb58ee63.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/doxamizale.pdf
    • https://cdn.shopify.com/s/files/1/0460/6502/5179/files/36755027873.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/bene_gesserit_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/waxus.pdf
    • https://cdn.shopify.com/s/files/1/0438/3526/1085/files/zipugotifururop.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7002/files/bemipu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/wuwafebekufe.pdf
    • https://cdn.shopify.com/s/files/1/0427/8291/6767/files/napijizupizekenuloferutuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/1656/8482/files/29881418407.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fad.bin
6b4dd00d50456ebba905efa6b3e027d9aa0c61f96e9df4902df0d2751d9d5a9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FAD 5128 bytes
font_01_sfnt_off000060e9.bin
8679e8c0f5572ee88e45fcde5da25aac1079c5d88ea374f5ef13968585d4d742		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E9 11076 bytes
font_02_sfnt_off000084f2.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84F2 4324 bytes

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