Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbb3302c8c8ea4dc…

MALICIOUS

PDF

48.6 KB Created: 2020-10-02 10:13:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1050bc44b814cc23b3dea30c935b9cb7 SHA-1: 1833a753614b6dcbc04e0a51e8199ea0df082f03 SHA-256: dbb3302c8c8ea4dc277de6fd0c125b99873eb77bf6ba2625adce6bb012ac0006
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that are part of a link farm, with one primary link leading to a redirector. The document body, though heavily corrupted, contains text suggesting it is a "National treasure study guide", likely a lure to encourage clicks. The presence of numerous external PDF links and a redirector indicates a malicious attempt to direct users 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.link/pify?keyword=national+treasure+study+guide In 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/1/0431/5450/5885/files/texas_driver_license_audit_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/mowakobejoxawexujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2909/8396/files/ripisivavikiwurad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5768/7959/files/zurolusefifemibax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/can_target_look_up_my_receipt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1083/3058/files/how_do_you_say_hi_beautiful_in_italian.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0836/8545/files/cursive_g_uppercase_font.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5809/4495/files/46509384765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0083/4466/files/5e_xanathars_guide_to_everything_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1058/8309/files/19435314388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1862/8505/files/calendar_november_2018_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/983accb7-8195-4016-98bc-763d2866b358/41760979850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f799f92d-0196-4816-9859-45e5e5153ecf/50741847074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbd8f0a1-f511-4ec2-b3eb-3b577b1d0751/18686534732.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_off00008004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8004 5064 bytes
SHA-256: 8fbb66c2d451fbd54bcb8c7324d3936dd22e75e68b2d7a931bcf5824e65b7214
font_01_sfnt_off00009158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9158 10652 bytes
SHA-256: 8a91c52e044b87355fe667c509d965a981dc2f9b11c5af43c80d5dd41b30361a

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