Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1e1d26cbb4b842f…

MALICIOUS

PDF

45.8 KB Created: 2020-10-14 23:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: f5435dc02db5be6514721e3b57f01ec4 SHA-1: 959c4058482487131ebafa7083412ced73636cf9 SHA-256: f1e1d26cbb4b842f74882d5e836f8d21d3b3a444b13c5ca4fb624f5696490cdc
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ggtraff.ru'. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to attract search engine traffic. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users to a malicious site via a deceptive link.

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://ggtraff.ru/pify?keyword=biografi+soekarno+cindy+adams+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f874fdc17b8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f875e1599576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f8732a2d367d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5f870e34e1265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f871c5d4a895.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f871518c5778.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/tixobenudofezibet.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/4256338.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/foburadip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/022a1abb-85cb-41a9-845d-ad3c6a2d3b7d/52804729772.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aeda5e2-aeea-4718-959c-ff1c5ec13c6f/gebapulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d62eaaa-8ff2-4edc-a2cb-5b485851d3a1/gunudonovakinofapudizedol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff95dcc7-4b24-4fb7-9a24-aad6dc9c9e01/42349361970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edf2f554-8b50-405f-9c0d-82b8e5e968ee/fegeridolagebizafajoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3123/3180/files/sex-linked_traits_definition_genetics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3140/3927/files/75292258881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3057/7817/files/rarusiwajozura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4517/4439/files/muzivasuzewipekumine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5490/2677/files/nunujaruworileduvibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1351/2100/files/period_of_a_wave_graph.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/4891/8936/files/fubino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/8315/7670/files/lupobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6559/8364/files/38903015562.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71DB 5656 bytes
SHA-256: 5bd7af20436bee9612db458b826af8b7c15f50b56cdb196ca714eea3c3c0eb1c
font_01_sfnt_off00008516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8516 10720 bytes
SHA-256: 2e35b83fb3048d4557616bbe84efed78025992d3f0b8f20deb061fd85e49ab47

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