Malicious PDF — malware analysis report

Static analysis result for SHA-256 343a215c6d8a78a2…

MALICIOUS

PDF

41.0 KB Created: 2020-07-24 22:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d52b8dd7e4f5817c4b02ecff9ec7a342 SHA-1: 500d901aaa9fda1bc2df2227af98b978a82bcf60 SHA-256: 343a215c6d8a78a20c0f7ee369a970950db89ebb362a975458f18ff24c3ab2ee
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of numerous external links suggests an attempt to lure users to malicious sites, potentially for phishing or malware distribution.

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.ru/pify?keyword=pokemon+3d+games+offline
    • http://files.stampsrhistory.com/uploads/1/3/1/4/131454286/xomosum.pdf
    • http://files.the-authorscorner.net/uploads/1/3/1/3/131398224/128704.pdf
    • http://files.mealprepdaily.com/uploads/1/3/1/1/131163856/4842700.pdf
    • http://files.vibrantlivingmn.com/uploads/1/3/1/4/131482822/42b93.pdf
    • http://files.shamanmodifications.com/uploads/1/3/2/6/132695633/liguluxivetemez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1587610690.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fuwemosuwizukuxitakalav.pdf
    • https://cdn.shopify.com/s/files/1/0429/7929/5385/files/gezirolufetikunidupuxuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/31659653215.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/37683869874.pdf
    • https://cdn.shopify.com/s/files/1/0427/4873/9740/files/90898819134.pdf
    • https://cdn.shopify.com/s/files/1/0437/5294/7863/files/6156246904.pdf
    • https://cdn.shopify.com/s/files/1/0440/9052/3813/files/mepugepokujikeja.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/56749083005.pdf
    • https://cdn.shopify.com/s/files/1/0433/4888/5662/files/66948805756.pdf
    • https://cdn.shopify.com/s/files/1/0433/0291/2168/files/95264232521.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_off00005bc2.bin
cbd76b17cd3f9d0cb3fc1095edbc58e4ae3955b89da37d75d11e4d117d5a29d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC2 5068 bytes
font_01_sfnt_off00006ce7.bin
fe7b70e31f4beac1d1e0e7bfceb73fe89266936216fa5333d5a49d4a04430ade		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE7 1608 bytes
font_02_sfnt_off00007575.bin
252bd2211fd66479c09385f5f26c0cb95e2331722a23e45e12fc5a591d5503e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7575 10156 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.