Malicious PDF — malware analysis report

Static analysis result for SHA-256 9149fb6e02a44ffe…

MALICIOUS

PDF

57.4 KB Created: 2020-08-31 10:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e86f0cfb00cfb7fbc7d2f7fc345e00d SHA-1: 0f064508b989d2d39251fd7852fadc21b53b7335 SHA-256: 9149fb6e02a44ffeb26f93966a6e58024910ba0bc0f9d8569d36b77866d5ca6c
152 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, which is also present in the document body. The ML classifier strongly indicates maliciousness. The primary IOC is the redirector URL, which is likely used to lead the user to a malicious site. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious link is sufficient for this assessment.

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.cc/wix?keyword=grille+d+analyse+de+la+concurrence
    • https://cdn.shop
    • https://static.usrfiles.com/ugd/3f0e57_6aa8b829a3a94e1e85f45df1f74651cc.pdf
    • https://static.usrfiles.com/ugd/4b68be_e1ae84aa7cb84c8494640947c1c24678.pdf
    • https://static.usrfiles.com/ugd/b8c837_86d98b21fc1d43efb53e28b5f3749d7c.pdf
    • https://cdn.shopify.com/s/files/1/0455/4260/4965/files/cargill_inc_annual_report_2020.pdf
    • https://cdn.shopify.com/s/files/1/0441/1876/9816/files/wunajinamutuzaxaxigikoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/2517/0595/files/87193651120.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6896/files/254762699.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/44277760704.pdf
    • https://cdn.shopify.com/s/files/1/0437/7231/3749/files/batman_v_superman_secret_ending.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4367/files/27265677061.pdf
    • https://static.usrfiles.com/ugd/5ad03d_41d492206163423c8d36d883002253d5.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_d1ccbba183c941798fb2405f0d999cce.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_off0000915b.bin
b0fc0727df2e5c20b1fc11311a2a461b1224383d5dc31176a25f6d90bb793840
pdf-font-stream PDF embedded font (sfnt) at offset 0x915B 4868 bytes
font_01_sfnt_off0000a1ef.bin
a41a2a6ad669ee699ad9f4134a70ddbd8117e5f9efba23067e6f99d5fe07f77b
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1EF 12300 bytes
font_02_sfnt_off0000c8c0.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C0 4324 bytes