Malicious PDF — malware analysis report

Static analysis result for SHA-256 1073637079a9aef2…

MALICIOUS

PDF

57.0 KB Created: 2020-07-10 21:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b78b7d0381e6ecaf95ff67dc1f40c9ab SHA-1: 974eb8e2f00750803ea5dd5a87891b698e986115 SHA-256: 1073637079a9aef2885f0af484bdd0fbf0fcd31dea2e412237ba4b83ff24c09b
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which are part of a link farm designed to appear as search results for a manual. The primary URL, 'https://ttraff.com/wb?keyword=lahti%20precision%20wa-810%20manual', acts as a redirector to other malicious sites. This indicates a phishing or SEO poisoning attack aimed at driving traffic to potentially harmful content.

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/wb?keyword=lahti%20precision%20wa-810%20manual
    • http://files.squareonegoodsco.com/uploads/1/3/2/8/132815154/tasawaz.pdf
    • http://files.samndoesart.co.uk/uploads/1/3/1/3/131398197/e6d212.pdf
    • http://files.bradyvu.com/uploads/1/3/1/0/131070481/jivanutunugefos.pdf
    • http://files.highlandmillsumc.com/uploads/1/3/0/7/130776344/24a34f4b9659b6.pdf
    • http://files.himelappraisal.com/uploads/1/3/1/3/131380107/silabulaxemukuroxu.pdf
    • http://files.skindeepinktattoo.com/uploads/1/3/0/9/130969473/7837570.pdf
    • http://files.hugoedgar.com/uploads/1/3/2/8/132816165/3057520.pdf
    • http://files.designbyalyssamarie.ca/uploads/1/3/1/3/131379991/b04ddb0b590f69.pdf
    • http://files.3daudiosense.com/uploads/1/3/0/9/130970001/pixazazipul.pdf
    • http://files.kaarunya.org/uploads/1/3/2/3/132302913/2057029.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://muposariga.files.wordpress.com/2020/07/negames.pdf
    • https://diwunibe.files.wordpress.com/2020/06/nanugivomin.pdf
    • https://jefunalas.files.wordpress.com/2020/06/divekimabodebivopinosobo.pdf
    • https://tidisoli.files.wordpress.com/2020/06/46468712938.pdf
    • https://lidalavanepu.files.wordpress.com/2020/07/gesipex.pdf
    • https://jovutevuk.files.wordpress.com/2020/07/51553643699.pdf
    • https://latixeneseka784727690.files.wordpress.com/2020/07/80043939585.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wakorijupomimenupe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tapowizilefaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zosogorimojafi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/davadotorometib.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81667611697.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_off00009d68.bin
d0ec9f0403e50bb1e381e8ce3bc96f11d6078b304bdb4ac900af91f4c969f8de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D68 5508 bytes
font_01_sfnt_off0000b010.bin
83f0df85957d9a6aa0ac917d7943bc9ce000c58308e1002d185e04647f8cae48		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB010 11560 bytes

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