Malicious PDF — malware analysis report

Static analysis result for SHA-256 199b26c538f49635…

MALICIOUS

PDF

50.2 KB Created: 2020-08-04 23:40:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8d1587e066c42f673be871dda15c2a1 SHA-1: c344b6e2314769d2b6c8f936e53b94b2fd89063a SHA-256: 199b26c538f4963516c3591b7a5a55d867b884433443fa6743fdc21d0481cfea
154 Risk Score

Malware Insights

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

The PDF document contains a deceptive link presented as a download for '12 rabi ul awal speech in urdu pdf download'. This link redirects to 'https://ttraff.com/wb?keyword=12%20rabi%20ul%20awal%20speech%20in%20urdu%20pdf%20download', which is flagged as a malicious redirector. The document also features a large number of external PDF links, many of which point to potentially malicious hosting sites, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness.

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.com/wb?keyword=12%20rabi%20ul%20awal%20speech%20in%20urdu%20pdf%20download
    • http://files.jotuncap.com/uploads/1/3/1/1/131163734/zinabafedaj-zuzabibajasepog.pdf
    • http://files.therubythroat.com/uploads/1/3/2/8/132815004/fibanapobuvidufi.pdf
    • http://zoloti.rcherringtondesign.com/uploads/1/3/1/4/131453645/kanikib_suduguzivowus_gowegenuxitideb_mimumabepok.pdf
    • http://files.riverpoethansen.com/uploads/1/3/0/7/130739856/fowewu.pdf
    • http://files.careers-nm.org/uploads/1/3/1/3/131382808/a4e7735f149fd8f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vevisip.pdf
    • https://cdn.shopify.com/s/files/1/0450/3748/6238/files/e_aadhar_card_download_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/0790/9781/files/96493453901.pdf
    • https://cdn.shopify.com/s/files/1/0429/4184/1575/files/10156843387.pdf
    • https://cdn.shopify.com/s/files/1/0433/6418/8312/files/72512212171.pdf
    • https://cdn.shopify.com/s/files/1/0432/4530/6011/files/c_serialize_object_to_xml.pdf
    • https://cdn.shopify.com/s/files/1/0429/4914/8828/files/56711832466.pdf
    • https://cdn.shopify.com/s/files/1/0428/2269/7126/files/53849669983.pdf
    • https://cdn.shopify.com/s/files/1/0439/8402/7806/files/87899017165.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3584/files/oxford_dictionary_of_earth_science.pdf
    • https://cdn.shopify.com/s/files/1/0428/4514/3207/files/seveselifomujoxufawi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6586/8437/files/vagatufegivosupogidubewo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4266/7676/files/kezodisuxi.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006977.bin
50bc37dadebe37b725f4d2df19635eadd474ef99fc25a7f9da663804724482ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6977 5564 bytes
font_01_sfnt_off00007c6a.bin
07c9e1cacad4fca75afe631f8b280e1c3907a4ab0a9ded269e292c94c10714c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6A 10468 bytes
font_02_sfnt_off0000a034.bin
1bfc3847c371a4e1c748b6574bc22c125882e3e86bf4633761c9b55f8d04d7cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA034 17772 bytes

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