Malicious PDF — malware analysis report

Static analysis result for SHA-256 325884300e1586c3…

MALICIOUS

PDF

49.6 KB Created: 2020-08-05 10:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 024b35afce67e27ae80478d2954aa886 SHA-1: 3fe7bab2ea4a542a43f189c7d33b5cc9d8a5de48 SHA-256: 325884300e1586c3a253c2c7eea6055e7bf8b349c92bc082611d42142dbf6c9c
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=online+rent+agreement+format+pdf'. Another critical heuristic indicates a PDF link farm, suggesting an attempt to game search engines for visibility. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text related to 'online rent agreement format pdf', aligning with the lure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=online+rent+agreement+format+pdf
    • http://dutitikos.orlange.org/uploads/1/3/1/4/131453284/nesis_jivuzaviro.pdf
    • http://files.lifestyleofthebeliever.org/uploads/1/3/1/4/131455543/nejixufowav-namow.pdf
    • http://files.teenanxietydepression.com/uploads/1/3/0/8/130813827/7668648.pdf
    • http://files.townsend-rogers.org/uploads/1/3/1/3/131384025/joxetopelepuwul_zedexefameveru_vefipenekanefo.pdf
    • http://files.cedarhousequilting.ca/uploads/1/3/1/3/131384407/sitigoja.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/pupiwisigojelumofexog.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4993/files/27451534367.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7922/files/k_l_chung_elementary_probability_theory.pdf
    • https://cdn.shopify.com/s/files/1/0431/0961/3725/files/55807398822.pdf
    • https://cdn.shopify.com/s/files/1/0431/0768/0405/files/matupixalagoveniwefoxan.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6166/files/libemijer.pdf
    • https://cdn.shopify.com/s/files/1/0436/0513/1421/files/97976650782.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6599/files/tidolexuvit.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/2984/files/12648599744.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/33820532968.pdf
    • https://cdn.shopify.com/s/files/1/0430/0505/1029/files/19685749436.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96258555683.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_off00008534.bin
d713aec74b9406ca5e4ba75a7911ef268310ef8c44dba0dedf5c00b02c26ed1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8534 5212 bytes
font_01_sfnt_off000096d8.bin
fd5b31be79e965fbe9aea996a3ec330694227e1825749d6ba14e384a0a6fab28
pdf-font-stream PDF embedded font (sfnt) at offset 0x96D8 10080 bytes