Malicious PDF — malware analysis report

Static analysis result for SHA-256 df9c9e0442922677…

MALICIOUS

PDF

34.5 KB Created: 2020-08-18 14:23:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2817fbcd9271400b8c9098db4f920154 SHA-1: 572a76f5aad44f372290afe10b1cde547e1e3408 SHA-256: df9c9e04429226773887853ae3fd1e870233a0573f39a6684db508c5290228f5
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, a common tactic for phishing and malware distribution. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that one of the primary links, 'https://ttraff.cc/pify?keyword=tamil+nikah+bayan', leads to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic reveals a large collection of links, predominantly hosted on cdn.shopify.com, which likely serve to obscure the malicious intent or to distribute further payloads. 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.cc/pify?keyword=tamil+nikah+bayan
    • http://lugoz.juneprojectls6.com/uploads/1/3/1/3/131379808/xagetijeliber.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/80339395992.pdf
    • https://cdn.shopify.com/s/files/1/0434/1966/4541/files/cards_against_humanity_first_expansion.pdf
    • https://cdn.shopify.com/s/files/1/0429/9915/2799/files/gametakurejapazojirerozez.pdf
    • https://cdn.shopify.com/s/files/1/0438/4869/5958/files/81880937422.pdf
    • https://cdn.shopify.com/s/files/1/0428/3292/0732/files/42769509574.pdf
    • https://cdn.shopify.com/s/files/1/0431/0247/0306/files/26945051104.pdf
    • https://cdn.shopify.com/s/files/1/0452/5244/4320/files/pdfbox_pdpage_example.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/fusegutorowob.pdf
    • https://cdn.shopify.com/s/files/1/0434/0452/5720/files/89358174165.pdf
    • https://cdn.shopify.com/s/files/1/0434/6304/9376/files/radasekinimoritomon.pdf
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/cambridge_advanced_learner_dictionary_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/9884335300.pdf
    • https://cdn.shopify.com/s/files/1/0434/2690/6264/files/tuxowiwonibaxuwaforu.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_off000047b5.bin
cc47b089f863427d67d993cde867621bad63f0a2cf28b69700161a626f004f40
pdf-font-stream PDF embedded font (sfnt) at offset 0x47B5 4904 bytes
font_01_sfnt_off00005844.bin
3376600174cb4100895b8857e84971b7e506cf829e171bbc3f796e2498af8fe5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5844 10512 bytes