Malicious PDF — malware analysis report

Static analysis result for SHA-256 0619ea9f358d5a33…

MALICIOUS

PDF

47.1 KB Created: 2020-08-07 00:28:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43dfe7d868164bb0249e4c0603f1cde3 SHA-1: 8a4790f536b592584f8788fd75e36e7c9a4d693c SHA-256: 0619ea9f358d5a33469f8d320bf8d0cf455189c04b5b28440a7c657ad0e3445b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text and URLs that suggest a lure to external content. The presence of a malicious redirector and a large number of external links indicates an attempt to direct users to potentially harmful websites, likely for phishing or malware distribution.

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=automotive+biw+design+pdf
    • http://zepejit.eatwithjames.com/uploads/1/3/0/9/130969754/dubige.pdf
    • http://files.gammazetadecaturtn.com/uploads/1/3/1/4/131452750/4148767.pdf
    • http://jomutomir.27andoak.com/uploads/1/3/0/7/130775432/3156213.pdf
    • http://ralozi.fieldtripsdelivered.com/uploads/1/3/1/3/131398140/8729809.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29025511016.pdf
    • https://cdn.shopify.com/s/files/1/0430/9745/6789/files/academic_writing_genres_samples_and_resources.pdf
    • https://cdn.shopify.com/s/files/1/0438/9958/4664/files/97943194208.pdf
    • https://cdn.shopify.com/s/files/1/0431/6315/6641/files/juzuxipulemu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/mobominiguvefavemegojeva.pdf
    • https://cdn.shopify.com/s/files/1/0433/4452/7511/files/jikisixofutum.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/24231071469.pdf
    • https://cdn.shopify.com/s/files/1/0437/6464/6037/files/jexamomifa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1577/4108/files/96280502654.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9639/files/xulufiweke.pdf
    • https://cdn.shopify.com/s/files/1/0437/8283/2280/files/64417257610.pdf
    • https://cdn.shopify.com/s/files/1/0433/6310/6968/files/kafokabotiveridunura.pdf
    • https://cdn.shopify.com/s/files/1/0437/7047/8746/files/10000_days_tool.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/microxp-_0._82._iso.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b24.bin
e66a1627b8f2025ac7e2302f9bdd0cc6b53e3e67876cf0190720eed3b5f2e4ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B24 5188 bytes
font_01_sfnt_off00007cd3.bin
13512f3b2573be9495dc8235f63a168e7e8947d57ced4e3ecf2a31bac7adb7ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD3 10780 bytes
font_02_sfnt_off0000a175.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA175 4324 bytes

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