Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b9d57030b33ee51…

MALICIOUS

PDF

70.1 KB Created: 2020-08-02 06:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ace140dc77ebf111602f71d9e670d8b SHA-1: 4b89acdd970af800d4a6b0496616b110782b0937 SHA-256: 2b9d57030b33ee51c2af35b53c710d7e937ba6663c92133d7c7386e7f832dcd0
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by a machine learning classifier and contains a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=no+prefix+dbm'. The document also features a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or redirection strategy. The primary malicious intent appears to be directing users to potentially harmful external content via the ttraff.ru redirector.

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=no+prefix+dbm
    • http://files.sydneyschiffdanceproject.com/uploads/1/3/0/7/130775337/2689919.pdf
    • http://files.bonniebcollier.com/uploads/1/3/1/4/131437743/zelifutineto.pdf
    • http://files.windsorbaptistchurchil.org/uploads/1/3/1/0/131070313/wamezifu.pdf
    • http://files.tileplus.net/uploads/1/3/1/4/131438071/goniwibeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/59379907662.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/61420838570.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17232613021.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/how_to_send_a_message_discord._ks.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8369/files/volvo_penta_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/4538/8442/files/50960423683.pdf
    • https://cdn.shopify.com/s/files/1/0431/8694/6206/files/47855039843.pdf
    • https://cdn.shopify.com/s/files/1/0428/5209/0022/files/68263000567.pdf
    • https://cdn.shopify.com/s/files/1/0436/4029/1486/files/poke_radar_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0430/0508/3811/files/dumagidexazexazugifusiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/9600/7065/files/dawagekigo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0582/9532/files/49542632192.pdf
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/30393952502.pdf
    • https://cdn.shopify.com/s/files/1/0433/4610/0374/files/wabepalavenemikofed.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_off0000bbb7.bin
db6190b0ee21d428c42a61c89705da585a5292c2c619ee1ef50820c6b17c7dec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB7 4944 bytes
font_01_sfnt_off0000cc74.bin
1efb6c7300fce99fefc178a7925606bd49358e2aa54c9d0c9f8323740279def4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC74 13272 bytes
font_02_sfnt_off0000f6da.bin
530ff5b075befe60ee741b28edfc3ef5dbe104a983a394340679dcffc81e9b6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DA 16064 bytes

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