Malicious PDF — malware analysis report

Static analysis result for SHA-256 a86ece610225eca4…

MALICIOUS

PDF

49.7 KB Created: 2020-10-26 23:23:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0938434d2140830dbcc85ea7554397d SHA-1: 819369a89a6b34e45823fa3e4d6d8dcde0d427eb SHA-256: a86ece610225eca4ed8dc388b16571eb9e39f34564fe4edac00871ceccb89275
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning tactic. One prominent URL, 'https://ggtraff.ru/strik?keyword=what+station+is+disney+plus+on+xfinity', is identified as a malicious redirector, indicating an attempt to lead the user to a malicious site. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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://ggtraff.ru/strik?keyword=what+station+is+disney+plus+on+xfinity
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/6c3d79a4c8.pdf
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/3293385.pdf
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/xakibefakodo_godefib_rudosunov_xonizoroxutuf.pdf
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/2570276.pdf
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/9884818.pdf
    • https://luwamagol.weebly.com/uploads/1/3/4/3/134375262/090aed6b44dd6.pdf
    • https://fopimakalegej.weebly.com/uploads/1/3/0/7/130738542/9243153.pdf
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/jomivedokugirulilum.pdf
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/5592955.pdf
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/038b7.pdf
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f878377d2bed.pdf
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f871ece5cb73.pdf
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f86f43d9d918.pdf
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f907dd71aeda.pdf
    • https://cdn-cms.f-static.net/uploads/4387243/normal_5f90bb786d871.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/xanebavifamopez/7557886378.pdf
    • https://s3.amazonaws.com/pibajuwi/kamalofukifipibetuzen.pdf
    • https://s3.amazonaws.com/subud/31090655128.pdf
    • https://s3.amazonaws.com/kabisebax/tabeg.pdf
    • https://s3.amazonaws.com/sugaguxagu/82047350243.pdf
    • https://cdn.shopify.com/s/files/1/0501/1085/7381/files/download_smurf_village_mod_apk_hack.pdf
    • https://cdn.shopify.com/s/files/1/0493/8842/1282/files/zavokabi.pdf
    • https://s3.amazonaws.com/gupuso/pofatinemufosame.pdf
    • https://s3.amazonaws.com/varoximu/essay_on_student_life_in_200_words.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_off00006e25.bin
8fbbc8d5584331b47fee1341ab145dec4f13ae33749d20cecccda1b069a57881		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E25 5100 bytes
font_01_sfnt_off00007f8c.bin
2c8d59d02882accf4f985045cda3503896ad647c89450105837c9a18c02ca575		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8C 12100 bytes
font_02_sfnt_off0000a8d2.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8D2 4324 bytes

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