Malicious PDF — malware analysis report

Static analysis result for SHA-256 089cf26665fc90ae…

MALICIOUS

PDF

38.1 KB Created: 2020-08-18 14:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0b07a1879283fcf414c601870947d3c SHA-1: 55a6e79edb9573a8b8b2683c909129043c76fedb SHA-256: 089cf26665fc90ae8258f5d2e9dff40a7542ebe1602aaff7a8802599406ee914
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 Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. Crucially, one of the links redirects to `ttraff.cc`, which is flagged as malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the intent to direct users to harmful content. No scripts were extracted, and the primary malicious activity observed is the redirection to a known malicious URL.

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/pify?keyword=charly+black+free+music
    • http://files.hecmbacouncil.com/uploads/1/3/1/4/131453436/lorikivikenemage.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/6874/4099/files/93373966944.pdf
    • https://cdn.shopify.com/s/files/1/0433/4206/9918/files/75335680616.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/39987526788.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5329/files/good_anime_games_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/memabomabinurusuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/6767/0689/files/35920131284.pdf
    • https://cdn.shopify.com/s/files/1/0432/3278/8648/files/67451747019.pdf
    • https://cdn.shopify.com/s/files/1/0440/4409/1557/files/jutufazikidejogavosoger.pdf
    • https://cdn.shopify.com/s/files/1/0430/3159/3113/files/91901176853.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_off0000489a.bin
cd5162a615fa2bde9e29d8848ca0e14a36e05ce48a011d0098a80d2abd304a7a
pdf-font-stream PDF embedded font (sfnt) at offset 0x489A 5036 bytes
font_01_sfnt_off000059c4.bin
d4917e98a74ce2ae3701f2ec69200ea5c5d25adfbd47eb2b14998ab9e6d7024a
pdf-font-stream PDF embedded font (sfnt) at offset 0x59C4 10628 bytes
font_02_sfnt_off00007de7.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE7 4324 bytes