Malicious PDF — malware analysis report

Static analysis result for SHA-256 686f7c5afe0c19bc…

MALICIOUS

PDF

42.5 KB Created: 2020-08-15 11:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8ed07c3d60b4f9b329bd5e13e0cb802 SHA-1: 5bac81e75ef018e64ae7d0473febf386be41d515 SHA-256: 686f7c5afe0c19bcf47562bdd090a57007c9e81bdaa6eaff46d0f5e9fe40d7a4
154 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to PDF files hosted on Shopify and other domains, suggesting a link farm for SEO manipulation or traffic redirection. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.cc', which is likely the primary malicious component. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is designed to lead users to harmful sites.

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/wb?keyword=delta%20plc%20programming%20tutorial%20pdf
    • http://files.stephanielin.co/uploads/1/3/1/3/131398362/56d39fd7d504.pdf
    • http://files.ladyannestrunkomaha.com/uploads/1/3/1/6/131636807/588a702b235eda.pdf
    • http://nematepek.serveuga.com/uploads/1/3/2/8/132814930/fexawelufaweja-tajobob.pdf
    • http://files.servastaiwan.org/uploads/1/3/0/9/130969942/6f4731.pdf
    • http://files.rafaelhohmann.com/uploads/1/3/1/3/131384589/rapibifeponubake.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2548/9305/files/14741901885.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/44369915446.pdf
    • https://cdn.shopify.com/s/files/1/0431/9700/5981/files/data_analysis_with_r_tony_fischetti.pdf
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/wenefofulilemuboduviv.pdf
    • https://cdn.shopify.com/s/files/1/0430/5479/2866/files/mimizijunozawu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/75565257125.pdf
    • https://cdn.shopify.com/s/files/1/0432/8731/4590/files/segas.pdf
    • https://cdn.shopify.com/s/files/1/0434/2988/8161/files/whirlpool_duet_ht_washer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/kevok.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/47406006068.pdf
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/active_and_passive_voice_interrogative_sentences_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0430/1222/7225/files/26177823083.pdf
    • https://cdn.shopify.com/s/files/1/0437/3925/0853/files/85227286843.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_off000068cf.bin
0e131c79d2d7fb43ad535f3630ec6731866bb0ee4d9729b25252b20639965be3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68CF 5296 bytes
font_01_sfnt_off00007aba.bin
36703dd987d5aa2509a1df0e34692359c2deba5ca1cbef177afad9bc0d6134ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABA 10012 bytes

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