Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6f1f3c4150a162…

MALICIOUS

PDF

40.8 KB Created: 2020-09-01 01:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 222d4c6aaed87ea61f22a43a7e4ad983 SHA-1: 4418ca51db338a20e55d6d76b8bf71f09c1cddc9 SHA-256: 3c6f1f3c4150a162e8524ef096d2a1909b135a5da647903827f4c81c74c5a62c
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it's a redirector link to known malicious infrastructure. It also exhibits characteristics of a PDF link farm, with numerous external links, many pointing to shopify.com. The primary malicious IOC is the ttraff.club URL, which is likely used to lure victims. The document body contains obfuscated text and the 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.club/wix?keyword=former+ireland+football+players
    • https://cdn.shopify.com/s/files/1/0435/0862/9663/files/50714726973.pdf
    • https://cdn.shopify.com/s/files/1/0460/6728/6180/files/netflix_mod_apk_premium.pdf
    • https://cdn.shopify.com/s/files/1/0432/2964/2916/files/grounding_guided_meditation_script.pdf
    • https://cdn.shopify.com/s/files/1/0435/4991/7333/files/xudomagev.pdf
    • https://cdn.shopify.com/s/files/1/0430/4591/2727/files/mastering_bitcoin_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/donofewemulefura.pdf
    • https://cdn.shopify.com/s/files/1/0448/3540/5986/files/16473252108.pdf
    • https://cdn.shopify.com/s/files/1/0440/1161/8462/files/pandora_music_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/37247792337.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/jakiritaxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3171/5225/files/borland_c_builder_trke.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab918a06946b4d48873b31213d183f3a.pdf
    • https://static.usrfiles.com/ugd/d01287_ba0f81e4dbc740f0b6f3f0b1955c6b61.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed90f2a3be8542cda28f486d9cbf2f16.pdf
    • https://static.usrfiles.com/ugd/1a89c8_202deccfaa33418ab706b37fe06afd32.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_off00006372.bin
777b8b6a83238d5f04149a5a982fb4dc90f76df87c10d35e54e4dedbd7086004
pdf-font-stream PDF embedded font (sfnt) at offset 0x6372 5384 bytes
font_01_sfnt_off000075ae.bin
3d056bc5550c063631439148cedef554fda432bc1c0d811d20db051590dd234b
pdf-font-stream PDF embedded font (sfnt) at offset 0x75AE 9772 bytes