Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f12a0c44d2c7b52…

MALICIOUS

PDF

47.3 KB Created: 2020-10-04 09:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 24c7ac7697706373ca93c7477d4343c9 SHA-1: b6159f404701ecc433a8f2a3c728c31e42ade658 SHA-256: 0f12a0c44d2c7b521073a011ca7e7e59a73cdbe71224004be53a9bb0edfd71fa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector service, which is a common tactic for distributing malware or phishing pages. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of a large number of external links, many pointing to PDFs, indicates a link farm used for SEO poisoning or traffic generation.

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.me/pify?keyword=conair+foot+spa+with+bubbles+massage+and+heat In PDF document text
    • https://site-1037061.mozfiles.com/files/1037061/90833623555.pdfIn PDF document text
    • https://site-1041486.mozfiles.com/files/1041486/pifaromixeguzatabi.pdfIn PDF document text
    • https://site-1040982.mozfiles.com/files/1040982/luzajolejubadadi.pdfIn PDF document text
    • https://site-1044065.mozfiles.com/files/1044065/29243566103.pdfIn PDF document text
    • https://site-1039631.mozfiles.com/files/1039631/60620759861.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/1/0484/6875/4586/files/diablo_3_save_editor_switch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/ncl_travel_agent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4747/6648/files/bad_boy_mower_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa36efa7-9111-443c-a865-fafee5d27f76/pubuvifiwumepibozinene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e181645-9a44-4373-85b2-1be6fa95bec6/nenosegetojubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5ce086b-21fa-43a4-99c4-8793bdb768ce/parovexuzak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db2cdd21-6ed9-4227-9ae3-7f1dd685fc3a/79401163592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eea9854-e706-4c07-baef-cc28b2c1bfc5/zafiragodinijenakejuroji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f980d82a-5768-4923-ba11-7ec4ad6c8a32/20310027160.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_off000077b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77B8 5592 bytes
SHA-256: db42124d5b31e95bdb73d2b009d8b0cf0704d0276e429c019b3e80531f926cfe
font_01_sfnt_off00008aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA2 11060 bytes
SHA-256: 233eec41805d8f789b613a0524bc2fe8ff6adaffe3e99aa7bfed6e0d85a7d5a6

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