Malicious PDF — malware analysis report

Static analysis result for SHA-256 3349b6952b3192a8…

MALICIOUS

PDF

46.0 KB Created: 2020-11-02 12:52:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e11280a4abe9bae660e2bb09c2c5212c SHA-1: 06631927595146e5ae1c4706dd67f9cb4065e38b SHA-256: 3349b6952b3192a805fe0bcbae856c045a6439748045871fdbc9dd3ee2225b9f
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, with a primary link directing to a known malicious redirector. The document body also contains the URL 'https://cctraff.ru/strik?keyword=niv+bible+app+download', suggesting a lure to a malicious site. The presence of a large number of external PDF links further indicates a link farm or SEO manipulation tactic. No scripts were extracted, but the embedded links are sufficient to classify this as malicious.

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://cctraff.ru/strik?keyword=niv+bible+app+download In PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/154714230facb3a.pdfIn PDF document text
    • https://gorigopaf.weebly.com/uploads/1/3/4/3/134341526/16d526e0d8.pdfIn PDF document text
    • https://wepeweguwerixum.weebly.com/uploads/1/3/1/8/131856135/nukik-tababi-wimowuweginulad.pdfIn PDF document text
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/tezelolagowade_joromiruxifawaw_vunej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/77edc345-d18b-4733-8ddd-e68d9aeba58a/62220669796.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/virtual_ethnography_hine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6408/9496/files/jifewa.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/straight_pool_bca_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/5479295511.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/fupinemibenedakaker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8748/5333/files/mukebavemaw.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/bolezoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd041da9-6e5b-4f1e-ae68-574160a081c4/honda_300ex_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c88db19-4e6d-4450-836c-06b96f40d22b/virtual_dj_8.2_full.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/59377632936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5489d8e-1062-4fb0-842f-c899b0f1deec/kigarozejodar.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68CA 4648 bytes
SHA-256: ae2b4b9639045a6e45c22611ced641f6ef84870e62d88cd0c3035ed83d1cc93e
font_01_sfnt_off000078a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78A6 10616 bytes
SHA-256: 4b85a6a2842115d366645b1db189eff1cc793c9d48ac149e5e188d5eec2cc377
font_02_sfnt_off00009d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D1C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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