Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe32d99c2daf11f…

MALICIOUS

PDF

43.2 KB Created: 2020-08-08 04:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 149a96576bc701e2fd9ea585b43c01e5 SHA-1: e037bfa1b8a7970ed287b44758283b3369642e6c SHA-256: cbe32d99c2daf11f57cd13bc951c9df212a2cfd3a074ec7344be920b6c9ea728
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=sistem+reproduksi+manusia+pdf', which is flagged as malicious. This suggests the primary goal is to lure the user to a malicious site. No scripts were extracted, limiting the analysis of further stages.

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=sistem+reproduksi+manusia+pdf
    • http://files.athleathan.com/uploads/1/3/0/7/130739810/02a045b450bbc2.pdf
    • http://files.motherwrenstudio.com/uploads/1/3/1/3/131379552/bevezikifozejeledo.pdf
    • http://files.imperialmarketeatery.ca/uploads/1/3/0/9/130969470/vetawidagojimonufute.pdf
    • http://zaroku.itsawonderfullifestyle.com/uploads/1/3/1/8/131856743/92fa40c.pdf
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/23785529924.pdf
    • https://cdn.shopify.com/s/files/1/0450/7457/9608/files/chinese_letters_to_english.pdf
    • https://cdn.shopify.com/s/files/1/0438/3657/1808/files/eduardo_galeano_su_majestad_el_futbol.pdf
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/44588360399.pdf
    • https://cdn.shopify.com/s/files/1/0429/9030/5443/files/pijinowepeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/sowepewuzek.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/kiroteteligumujajutega.pdf
    • https://cdn.shopify.com/s/files/1/0429/9282/8579/files/jemejazedusuramopuge.pdf
    • https://cdn.shopify.com/s/files/1/0435/2632/4383/files/similarities_between_curriculum_and_syllabus.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000600c.bin
90d93eacb6fcb7f0dc54dddb73977525d2826e02aaf5cd0cd6089731419c6fef
pdf-font-stream PDF embedded font (sfnt) at offset 0x600C 5204 bytes
font_01_sfnt_off00007199.bin
4b3f5c590280f7acef2d8658f474217618d4741fda1e8ec4e4cf89c0f93408c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7199 9408 bytes
font_02_sfnt_off000091c9.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x91C9 4324 bytes