Malicious PDF — malware analysis report

Static analysis result for SHA-256 c215db137bd75604…

MALICIOUS

PDF

43.1 KB Created: 2020-08-14 23:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1888fb348f55bcacfca1d4132b73b6d6 SHA-1: 8d47e1b26af9817d8a8df0aaf437265eea33b7df SHA-256: c215db137bd75604b703b5adb6a2b9f8456745dcdfb4184d481c114c2b50e565
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to various domains, including a primary redirector at ttraff.com. While the document body is heavily obfuscated, the presence of the malicious redirector URL strongly suggests an intent to lure users to a harmful destination.

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.com/pify?keyword=eclipse+neon+3+java+ee
    • http://files.themoveablechurch.org/uploads/1/3/0/8/130874128/9175303.pdf
    • https://cdn.shopify.com/s/files/1/0449/9764/0360/files/case_study_examples.pdf
    • https://cdn.shopify.com/s/files/1/0437/7070/8125/files/66743282592.pdf
    • https://cdn.shopify.com/s/files/1/0440/1758/2230/files/17126601972.pdf
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/bubewu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6957/1233/files/beguwubapaxuwigimosek.pdf
    • https://cdn.shopify.com/s/files/1/0448/2033/2705/files/39344653619.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/76784054827.pdf
    • https://cdn.shopify.com/s/files/1/0434/1848/4888/files/wasorusen.pdf
    • https://cdn.shopify.com/s/files/1/0432/9799/6960/files/amilasa_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/adjective_worksheets_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0432/4553/5400/files/jovejigezusudapetodo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f2b.bin
39462600d83897d2e221aeb6ba7cd3cd58ded11e9713689970f00f8dca8be44d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2B 5088 bytes
font_01_sfnt_off00007090.bin
cac96926ef5288ca3956fc28366ca214b8017814578abc3e52953214d4239fb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7090 15264 bytes