Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f30dd7892a385a8…

MALICIOUS

PDF

32.7 KB Created: 2020-08-22 11:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34b89d6c48256908c689cac29d9523e6 SHA-1: d8ea8683caecf2f1bd85618d01575db71886ad93 SHA-256: 6f30dd7892a385a8ae0b79965497b7dd57ca8c4465177d0947d2472aed6e132f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a link farm designed to redirect users to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The embedded link points to 'https://ttraff.cc/pify?keyword=lagu+celengan+rindu+feby', which is a known malicious redirector. The document also contains numerous other links to PDF files hosted on Shopify, likely part of a link farm to improve SEO for malicious content. No scripts were extracted, but the presence of malicious links suggests an attempt to lead users to harmful content, potentially as part of a phishing or scam campaign.

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=lagu+celengan+rindu+feby
    • http://files.britishcockapoosociety.com/uploads/1/3/1/4/131437839/f470e1fd8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3346/7807/files/belajar_gitar_otodidak.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/pobade.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26384136461.pdf
    • https://cdn.shopify.com/s/files/1/0438/7323/9195/files/xeposadaniper.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/10005397468.pdf
    • https://cdn.shopify.com/s/files/1/0434/3051/0758/files/ascorbic_acid_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0449/7352/3112/files/july_month_current_affairs_2020_testbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/9829/9813/files/zibebozuka.pdf
    • https://cdn.shopify.com/s/files/1/0432/9340/9438/files/free_online_converter_to_word_format.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004384.bin
e891fa7bbb1876f5e22851e0014e4699d7333d086363a6f6bf3143c49b54e602
pdf-font-stream PDF embedded font (sfnt) at offset 0x4384 5192 bytes
font_01_sfnt_off00005541.bin
43320ceefb2ae47cdc2189d7776b64bd304449fa1189406a3377f5cd8cf1428d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5541 9776 bytes