Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b8811e1489ff634…

MALICIOUS

PDF

50.5 KB Created: 2020-08-30 16:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ac6a13e6b992e501f85c9204d960fa7 SHA-1: f4d68d4dfb026105cebe1a0e3eee316165613449 SHA-256: 2b8811e1489ff634de11278813f9218b81904ab76bf4bfa70c12d1bb3b5512d6
152 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files. One of the primary URLs, 'https://ttraff.com/wix?keyword=les+familles+de+mat%25C3%25A9riaux', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be garbled text, but the presence of the malicious redirector URL and the link farm structure suggest an attempt to lure users to malicious sites or manipulate search engine results.

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/wix?keyword=les+familles+de+mat%25C3%25A9riaux
    • https://cdn.shopify.com/s/files/1/0430/9165/6864/files/77966301178.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/gesegojowarapitin.pdf
    • https://cdn.shopify.com/s/files/1/0439/1088/9624/files/algorithms_robert_sedgewick_and_kevin_wayne.pdf
    • https://cdn.shopify.com/s/files/1/0429/1674/1286/files/pupunovurisud.pdf
    • https://static.usrfiles.com/ugd/77d535_2c99365f592b4e2d90c5529c4cb28529.pdf
    • https://static.usrfiles.com/ugd/49be48_bc408352ccc544268ea838e361f5ed30.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f7374e4ddc74456af9432fd1a30e279.pdf
    • https://static.usrfiles.com/ugd/67f5f7_260604011ee0440797354d624e4974be.pdf
    • https://static.usrfiles.com/ugd/1fbf8b_b27e5254d40241c097127e21a80e1f0c.pdf
    • https://cdn.shopify.com/s/files/1/0436/2380/9187/files/latisi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9589/1871/files/vuluz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3164/9689/files/agricultural_biochemistry_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/1281/6034/files/pharmacotherapy_casebook_answers.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_off00006968.bin
c8d875d8ee916efd710f4924fb8ba589b3c961573f4b81a0eb1f2596d82e37e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6968 5204 bytes
font_01_sfnt_off00007ac5.bin
c10bf71820a039e7d41a94c0dda48cbccdaa3450dd558e8189c1b76257e616fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC5 12032 bytes
font_02_sfnt_off0000a104.bin
8375e7bc6742f9172a0dabc9f6dd98b80d7a1a7f44742a369b4f8a342a0728a7
pdf-font-stream PDF embedded font (sfnt) at offset 0xA104 17712 bytes