Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a5581006479ab7…

MALICIOUS

PDF

41.0 KB Created: 2020-08-09 08:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b18b1a1189cdef1a29aadb038207317 SHA-1: f0b16ab835706c570fa744d5565c75e5984df0bb SHA-256: 30a5581006479ab7d9cdb0f78fe966434f31e6bcb7e79b0c79381c148cac2114
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious Link

The PDF file contains a large number of embedded links to other PDF files, a technique often used for SEO poisoning or to distribute malware. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector link, suggesting an attempt to lure users to download further malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=expanding+tactics+for+listening+free+download+pdf
    • http://garisum.plymouthfirstsaturdays.com/uploads/1/3/1/6/131606758/tedolujef.pdf
    • http://files.welcomeinternationals.net/uploads/1/3/2/3/132302848/liduxasigol.pdf
    • http://files.profiledesigntooling.co.uk/uploads/1/3/2/6/132681479/5027124.pdf
    • http://wofib.trinitytrainingandsecurity.com/uploads/1/3/0/8/130813528/6818367.pdf
    • https://cdn.shopify.com/s/files/1/0437/3856/2712/files/duragotukamidikig.pdf
    • https://cdn.shopify.com/s/files/1/0432/1830/5179/files/wezuvewunumitovudu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8891/2290/files/danomomaludagunamal.pdf
    • https://cdn.shopify.com/s/files/1/0428/8102/4159/files/60148051221.pdf
    • https://cdn.shopify.com/s/files/1/0433/5783/1336/files/64587271896.pdf
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/julamul.pdf
    • https://cdn.shopify.com/s/files/1/0434/9453/9429/files/yaoi_anime_online.pdf
    • https://cdn.shopify.com/s/files/1/0448/3517/6608/files/english_bible_kjv.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/71380356351.pdf
    • https://cdn.shopify.com/s/files/1/0431/9045/2387/files/zijijijagabozejetu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/polyamide_properties.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_off00005818.bin
a94517e555c7d2ab836f6900f50c1b678ceef0e83a4985fca10527ff7f5e4876
pdf-font-stream PDF embedded font (sfnt) at offset 0x5818 5440 bytes
font_01_sfnt_off00006ac9.bin
1e3a8d29c836268a52a3764927a0931917906c4816569881ca11fac1e2597200
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC9 14260 bytes