Malicious PDF — malware analysis report

Static analysis result for SHA-256 8229c52699083e3c…

MALICIOUS

PDF

56.2 KB Created: 2020-08-25 01:29:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3edb73566747b95d96d241d22f2a45b7 SHA-1: 5cb9f603a4a821fb2442649d4becc0142f72eee5 SHA-256: 8229c52699083e3c7b92f425511da604afc5e78ca639f365fc619e7651b7d304
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link to a known malicious redirector, ttraff.com, disguised with a keyword related to a popular game. It also functions as a link farm, embedding numerous external PDF links, many of which point to Shopify. The ML classifier strongly indicated maliciousness, and the overall structure suggests an attempt to drive traffic to malicious infrastructure.

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=bleach+vs+naruto+3.+1+all+transformations
    • http://kigozog.million-minds.org/uploads/1/3/0/7/130738970/tilixawabeju_gidadinif.pdf
    • http://wakakod.btcjp.co/uploads/1/3/1/6/131606289/zujel.pdf
    • http://xamifagar.nnmstore.org/uploads/1/3/0/7/130739591/vowepizikadita_xezuranalus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2622/7093/files/socrative_math_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/2674/1405/files/unit_binormal_vector_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0464/8078/5576/files/84933624382.pdf
    • https://cdn.shopify.com/s/files/1/0428/4170/2567/files/25558120839.pdf
    • https://cdn.shopify.com/s/files/1/0437/8309/4434/files/71230947282.pdf
    • https://cdn.shopify.com/s/files/1/0434/8477/4552/files/fekezodevoboreg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39720928980.pdf
    • https://cdn.shopify.com/s/files/1/0436/2518/5442/files/xazokeri.pdf
    • https://cdn.shopify.com/s/files/1/0436/9698/0136/files/cisa_certified_information_systems_auditor_study_guide_4th_edition.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_off000092b3.bin
461d4da6f28b9ea56be8f23dda0e93eb5096956128c78a477d5af707f736c7af
pdf-font-stream PDF embedded font (sfnt) at offset 0x92B3 5480 bytes
font_01_sfnt_off0000a532.bin
cc794d437977fbe79db17cd9a0c4af361b5c3747dafffe4dbeef5d170f107d47
pdf-font-stream PDF embedded font (sfnt) at offset 0xA532 14972 bytes