Malicious PDF — malware analysis report

Static analysis result for SHA-256 6009d7ad491eae56…

MALICIOUS

PDF

42.8 KB Created: 2020-08-13 19:00:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f49a70bc639491256e4880b8f22221f2 SHA-1: 40359e15beb3732c024b40c5a6c22c0494f5878c SHA-256: 6009d7ad491eae56012ffbdd50607255a9c8d4018937f8ce2887c754997c225b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to external resources, which is indicative of a link farm or SEO manipulation tactic. One of the primary links, https://ttraff.ru/wb?keyword=desolation%20wilderness%20map%20pdf, is flagged as a malicious redirector. This suggests the document's purpose is to drive traffic to malicious infrastructure, potentially for further exploitation or phishing.

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/wb?keyword=desolation%20wilderness%20map%20pdf
    • http://nujob.bullsbard.com/uploads/1/3/0/7/130775484/rigejotarigaku-xiridukamokise-nidezazav-pavadimi.pdf
    • http://files.stroproductionz.com/uploads/1/3/1/1/131163898/d27c665.pdf
    • http://files.amytsaidesign.com/uploads/1/3/0/9/130969984/6db455bdf25f4aa.pdf
    • http://files.syrianamericanclub.com/uploads/1/3/1/1/131163867/loxofajexesafuwo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3092/0871/files/25723180205.pdf
    • https://cdn.shopify.com/s/files/1/0436/0945/6803/files/xetuvijide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/duliwoledemovaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/0628/0355/files/example_of_job_application_letter.pdf
    • https://cdn.shopify.com/s/files/1/0432/6244/3683/files/57435647665.pdf
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/49790333965.pdf
    • https://cdn.shopify.com/s/files/1/0431/8612/7009/files/68145146593.pdf
    • https://cdn.shopify.com/s/files/1/0436/7453/4041/files/bautagebuch_formular_kostenlos.pdf
    • https://cdn.shopify.com/s/files/1/0432/5212/1762/files/couper_un_en_plusieurs_parties.pdf
    • https://cdn.shopify.com/s/files/1/0434/7995/7669/files/pumobavo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/44865563320.pdf
    • https://cdn.shopify.com/s/files/1/0429/3584/5017/files/sijojabulawa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0568/1562/files/guwadedexutox.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_off0000641e.bin
5f9efe78a10872baba904bfc53bcff8ee00d59e87a7b652186253cf539b21fdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x641E 5276 bytes
font_01_sfnt_off0000760c.bin
b2c05bfe44e28f8d2a3580a5d1758d63a1eef18f7fa4095cd503de9a61f2d183		 pdf-font-stream PDF embedded font (sfnt) at offset 0x760C 11520 bytes

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