Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba7c31dde866fa1…

MALICIOUS

PDF

46.9 KB Created: 2020-08-17 16:13:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 403c8311d519032333ef3b39379c2919 SHA-1: 3097ca34b9d5929c2f5ac5bafb42225c94eace7a SHA-256: 0ba7c31dde866fa1138aee069a51046834e33d1f33dd62f8074672d56f1c8a88
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 redirector infrastructure like 'ttraff.cc'. The document body, though partially corrupted, contains text that mimics a report title and includes URLs, suggesting a lure to external content. The ML classifier strongly indicated maliciousness, and the presence of numerous external links, including a known malicious redirector, supports a phishing or malware distribution attack pattern.

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.cc/pify?keyword=preqin+alternative+assets+report+2019
    • http://pafalirer.thehandkraft.com/uploads/1/3/1/4/131453630/tikijemixodokini.pdf
    • http://files.shopmsbconway.com/uploads/1/3/2/8/132814305/lomolamowaxulil.pdf
    • http://files.feyeton.com/uploads/1/3/1/3/131379510/jixuxulugemuv.pdf
    • http://files.teachselfarabic.com/uploads/1/3/1/3/131379732/7382616.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3633/4490/files/16629581526.pdf
    • https://cdn.shopify.com/s/files/1/0430/4830/4797/files/taruxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/4842/0007/files/1871100202.pdf
    • https://cdn.shopify.com/s/files/1/0436/2996/9561/files/60513918619.pdf
    • https://cdn.shopify.com/s/files/1/0432/7371/5880/files/password_codashop_pro.pdf
    • https://cdn.shopify.com/s/files/1/0428/5906/9599/files/nozalozetonepugitejawesa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2960/files/van_morrison_astral_weeks_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0429/7929/5383/files/47891940945.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7349/files/xuzemo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4738/6268/files/mulowedunixupuwenepobofut.pdf
    • https://cdn.shopify.com/s/files/1/0430/3929/3589/files/3480828440.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/wukikakefeduzateroga.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078b7.bin
be57bb0d8761e9f3b5cb813de42405680059b0516ed3ee9e0c2b6e714f5f9b05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B7 5480 bytes
font_01_sfnt_off00008b6e.bin
d1d8cf68af4116461065e021977592950df4689a0331b59071163b70509b3916		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B6E 10332 bytes

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