Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd660489006db64…

MALICIOUS

PDF

37.2 KB Created: 2020-08-14 01:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9a5d096ba39b67d84977f1d89550089 SHA-1: 8a23356a68d17d7765de14e9ed40811477aea95f SHA-256: 3dd660489006db64da5bd91e182c9cd0a1ff834b1fef2cb97a69907e99d8b1c7
152 Risk Score

Malware Insights

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

The PDF contains a link farm of 12 PDF documents, with one primary link redirecting to the malicious domain ttraff.com. This suggests a phishing or redirection campaign aimed at users clicking on the links. The ML classifier strongly supports the malicious nature of this PDF.

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/wb?keyword=holster%20for%20p365%20with%20manual%20safety
    • http://files.ridesharespot.com/uploads/1/3/0/7/130740202/18dd5a2a393.pdf
    • http://mefubib.iwai-izmir.com/uploads/1/3/0/9/130969754/4200297.pdf
    • http://penonan.theheartofheatherworley.com/uploads/1/3/0/7/130740013/wozaxutikozavo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1221/7241/files/88153551606.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/92646959845.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4213/files/oblivion_were_wolf.pdf
    • https://cdn.shopify.com/s/files/1/0433/7106/9594/files/construction_of_dc_machine.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/58821127126.pdf
    • https://cdn.shopify.com/s/files/1/0434/3575/3639/files/14408069670.pdf
    • https://cdn.shopify.com/s/files/1/0438/4486/2114/files/convert_to_word_ocr_hebrew_online.pdf
    • https://cdn.shopify.com/s/files/1/0432/0703/2990/files/42030152848.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31688109027.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_off00004592.bin
1116455959b0161e8769a6ddb71e600dd6595d45ecc1df3badf38955f85b74b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x4592 5620 bytes
font_01_sfnt_off00005899.bin
b8eab9c4e1c5c9de185c02d2576d7d4d31b5c45dabb12350785772377f16f4eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5899 9860 bytes
font_02_sfnt_off00007a52.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A52 4324 bytes