Malicious PDF — malware analysis report

Static analysis result for SHA-256 45b64b1e707c2e0f…

MALICIOUS

PDF

50.0 KB Created: 2020-08-28 11:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f43eeeaf94656b238c979c4bdcb86ed1 SHA-1: 2aa5e047dad977ef5daed81e70765b6795c534d3 SHA-256: 45b64b1e707c2e0f67ac91418a4ca82c4447a7dbd46a9cbb7dbcd5a83ead2809
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 pointing to Shopify domains hosting other PDFs, which is indicative of a link farm for SEO manipulation or malicious redirection. One prominent link, https://ttraff.ru/pify?keyword=darkest+dungeon+love+interest, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting it is the primary lure. The presence of embedded JavaScript, though not directly analyzed here, is a common method for executing malicious actions within PDFs.

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.ru/pify?keyword=darkest+dungeon+love+interest In PDF document text
    • http://files.michaelmorrisnz.com/uploads/1/3/0/8/130813305/0c789c5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6908/6623/files/kowexabasoruzesoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5425/9606/files/27755685930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8351/2473/files/sobotta_anatomy_atlas_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3123/0624/files/gisisidowagabuxego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4486/4149/files/48625326415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/43643188331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/commission_sales_agent_agreement_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6830/1212/files/83118576813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/ninizaroranukonugol.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_off00008684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8684 5116 bytes
SHA-256: 7d8bb426ef12e1c315a46bda4cfdb7d0b5970e39d0d25224ce4877466bf3565f
font_01_sfnt_off00009803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9803 10420 bytes
SHA-256: 5199ed709affb0469759945284eeff8748360c83b993bc31345e8513bccbdb65

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