Malicious PDF — malware analysis report

Static analysis result for SHA-256 25705ba0b0852c91…

MALICIOUS

PDF

44.6 KB Created: 2020-08-03 03:34:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffa775a560f2d41147b722c3b494404a SHA-1: c0d26d9c49230dd5edaa5c97bb791f51028e28f3 SHA-256: 25705ba0b0852c9127c710cf9aa49434580a3f2e081cdb23e07a9dfc93ead9a3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one pointing to a known malicious redirector at `https://ttraff.ru/pify?keyword=add+gitignore+to+existing+repo`. The document body, though partially corrupted, contains text related to Git, suggesting a lure to trick users into clicking the malicious link. The presence of a link farm heuristic further indicates a malicious intent to distribute links, likely for phishing or malware distribution.

Heuristics 3

  • 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.
  • 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=add+gitignore+to+existing+repo
    • http://files.wyndolynsilkenwindhounds.com/uploads/1/3/1/6/131606454/lowewava.pdf
    • http://files.thatdrummerguy.com/uploads/1/3/1/3/131383982/4183514.pdf
    • http://files.whitneymclaughlin.net/uploads/1/3/1/3/131398515/373a6bfc2ca63.pdf
    • http://files.faithandfriendsinc.org/uploads/1/3/1/6/131636916/vezatek_wokajatijupifik_getegubebalawa_mageroru.pdf
    • http://files.luismaldonado.org/uploads/1/3/1/3/131383255/2243727.pdf
    • https://cdn.shopify.com/s/files/1/0431/8042/5370/files/lakidojalaxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51098187394.pdf
    • https://cdn.shopify.com/s/files/1/0429/0953/2323/files/satatik.pdf
    • https://cdn.shopify.com/s/files/1/0433/4393/7690/files/22003688564.pdf
    • https://cdn.shopify.com/s/files/1/0434/7455/0950/files/vim_relative_line_numbers.pdf
    • https://cdn.shopify.com/s/files/1/0435/6859/5112/files/25735253303.pdf
    • https://cdn.shopify.com/s/files/1/0430/7891/0106/files/fefonop.pdf
    • https://cdn.shopify.com/s/files/1/0431/8819/1396/files/xoxunon.pdf
    • https://cdn.shopify.com/s/files/1/0431/7013/6230/files/lugop.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007066.bin
da473014ab1a2b07af8724e1e2ce1cddb7a57d00d97d7873eb1d9b1c1ae0ff19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7066 4944 bytes
font_01_sfnt_off00008151.bin
791d5a1682ab6dc7c9871f4b4d68b2aef5698d5494f39b2f429aa2fc93c52d78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8151 10452 bytes

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