Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f4d0072b5044d9d…

MALICIOUS

PDF

45.5 KB Created: 2020-08-06 11:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4ae8e0080e14620c47a6a88c8b84307 SHA-1: 317c47146b5ed1613af7daf173fd81b7b75d9fd1 SHA-256: 5f4d0072b5044d9d913a66449b7b18b1f8bc22332c0d5b96794869785ca17210
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting seemingly benign PDFs, but the primary link redirects to a known malicious domain, ttraff.com. This suggests a link farm or SEO poisoning tactic designed to funnel users to malicious infrastructure. No scripts were extracted, but the embedded URLs and the PDF structure strongly indicate a phishing or redirection attack.

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/pify?keyword=bls+algorithms+2020+pdf
    • http://files.kineticorllc.com/uploads/1/3/1/3/131379700/6038878.pdf
    • http://files.nolagiftsanddecoronline.com/uploads/1/3/1/6/131606109/468afc69d9b.pdf
    • http://gowik.bangkokrepublik.co/uploads/1/3/1/4/131454106/tagamotupeza_mekiruv_motirivuzevoga_pagisuvaso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/4285/6344/files/sexubezagamajekiketorukaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2677/files/refuvurerelugumotuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6966/files/sasopaduviwaxafip.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/30262834756.pdf
    • https://cdn.shopify.com/s/files/1/0437/5710/9399/files/xuzofaravumazafowida.pdf
    • https://cdn.shopify.com/s/files/1/0435/9690/6659/files/audacity_2._3._0_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8851/1130/files/wedazofogikelibapeboximi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9074/6271/files/glencoe_physical_science.pdf
    • https://cdn.shopify.com/s/files/1/0433/0412/4580/files/jumuxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/46644885222.pdf
    • https://cdn.shopify.com/s/files/1/0438/8156/2280/files/bogipuzasafikevatoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zadolodiwifunum.pdf
    • https://cdn.shopify.com/s/files/1/0437/8384/8097/files/56466184153.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_off0000676d.bin
7cd8ad4dcb8ca24198482db1cca8d44fe97d7962c0b12d067aff0011aeb32821		 pdf-font-stream PDF embedded font (sfnt) at offset 0x676D 5344 bytes
font_01_sfnt_off0000798b.bin
7c81d0bd3a76baee61eaef10b2bc183a6d1796d61d0f5cb09f35de4bca473d30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x798B 9820 bytes
font_02_sfnt_off00009ae4.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE4 4324 bytes

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