Malicious PDF — malware analysis report

Static analysis result for SHA-256 b24b2f07f320d64f…

MALICIOUS

PDF

48.8 KB Created: 2020-11-04 14:38:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68471e3c97f936e2bdd1f1f15dc2963e SHA-1: ec61bd7ea83e795b7dcf8b81d37ddf9cd0825ec5 SHA-256: b24b2f07f320d64fad951a392e7c3b867567ce6b374203ed559b20351cf9f127
94 Risk Score

Malware Insights

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

The PDF contains a direct link to a known malicious redirector infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL, https://ggtraff.ru/aws?keyword=trimeter+definition+literature, is the primary indicator of malicious intent, likely serving as a lure for a phishing or malware distribution scheme. No scripts were extracted, but the presence of the malicious URL is sufficient evidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://ggtraff.ru/aws?keyword=trimeter+definition+literature
    • https://cdn-cms.f-static.net/uploads/4425759/normal_5f9c5b9ef151f.pdf
    • https://fupexojor.weebly.com/uploads/1/3/4/0/134017307/e0d996419d12b5.pdf
    • https://cdn-cms.f-static.net/uploads/4413240/normal_5f9ddf0b5afb8.pdf
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/5802a14c0a75.pdf
    • https://cdn-cms.f-static.net/uploads/4388827/normal_5f8f001e86a7a.pdf
    • https://liguroxuf.weebly.com/uploads/1/3/4/4/134443360/lofosaximiril.pdf
    • https://cdn-cms.f-static.net/uploads/4378164/normal_5f8e4179a3f2f.pdf
    • https://cdn-cms.f-static.net/uploads/4375339/normal_5f8d382cc2133.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zuxadol/66862022003.pdf
    • https://s3.amazonaws.com/solonebosop/visujipivafoluzidizafa.pdf
    • https://s3.amazonaws.com/memul/capitalismo_tardio.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000591b.bin
32662dd9e452d4b92bc949f900a4c063d65220dc521917bf76de1b9478db6c5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x591B 4824 bytes
font_01_sfnt_off00006963.bin
278a9552daac43b7720ec62afffd1c91651e47f6e2bf548100d4b9384f8fdbb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6963 4772 bytes
font_02_sfnt_off000078d7.bin
0814d84bc959bbe22dfb0d2873f4508278b1188d49b3a6b059e344af9d20341e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D7 12624 bytes
font_03_sfnt_off0000a192.bin
8f676b3be356e2086f34f7c81dd3575184be90372cbe0b4aaba7ba30be3377d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA192 16060 bytes

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