Malicious PDF — malware analysis report

Static analysis result for SHA-256 061d0f562711f1fa…

MALICIOUS

PDF

49.5 KB Created: 2020-10-02 10:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4da532b14270b4146c82a0232126bca2 SHA-1: e7f340910fa31391e9ada42498f5197ed101fcc8 SHA-256: 061d0f562711f1fa68d05af5595ce0b3212d003da21cace06192f70b8b0c5dc9
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://cctraff.ru/strik?keyword=turkey+tail+mushroom+identification, is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain this URL and other benign-looking links, suggesting a lure to trick users into clicking the malicious link. The presence of multiple external PDF links also indicates a link farm, often used for SEO manipulation or distributing malicious 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://cctraff.ru/strik?keyword=turkey+tail+mushroom+identification In PDF document text
    • http://xesij.trinityjamestown.com/uploads/1/3/0/7/130738765/1ed3b4310ff1.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/871021db-5663-4861-b19f-d12259c625ec/78276986057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96e3d63d-c763-4861-96e1-82fe31664797/556744815.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1b15229-df72-48ea-b206-cb0411aba5af/ramelot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af832da6-9298-426c-955d-48fdbf02cbb4/panonitexined.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f9f1c6c-a7b5-4fee-94c2-8424677345e4/xaputofu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b88e7ba-8083-472b-aa1f-25a209b3eac9/fosarekiwaxefenofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ecfb3ef-3759-48d6-a718-9d72bd7fabde/nujabijetusop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97572c40-a834-4e9b-b80c-e96eb81d5474/konamusoxozirafirurato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c28ceb67-eeb5-41a1-87d7-b02a338c3ead/votetapimafowakifomorig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7100/7639/files/11557263790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7827/8550/files/riverside_high_school_greer_sc_facebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/2977/0652/files/mine_blocks_game_download.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_off0000843c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x843C 5376 bytes
SHA-256: e600127c27f4fe0d581b16f3c769dedad55262b5c0f76633c8df336d825dd086
font_01_sfnt_off00009665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9665 10236 bytes
SHA-256: 6185853343a17cf5ba3157d0e1335890231cc4a8c01eb8704fde7dcf7c773da9

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