Malicious PDF — malware analysis report

Static analysis result for SHA-256 c46c520a7244ca9d…

MALICIOUS

PDF

61.1 KB Created: 2020-07-24 15:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc0b15c9fc4944a23bcd044f63d8a011 SHA-1: 76cddc66f8859424c1f6e020c7b4b787fffda6ad SHA-256: c46c520a7244ca9dc72224932f3a4ef58bf60ba48b731cbc643f0a5d322bdfba
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=g+n+m+ka+full+form'. Additionally, a PDF link farm heuristic indicates the presence of numerous external links, with 'https://cdn.shopify.com/s/files/1/0430/5063/1319/files/27129576703.pdf' being the first identified. The ML classifier also strongly flagged this PDF as malicious. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of malicious redirectors strongly suggests a phishing or malware distribution attempt.

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=g+n+m+ka+full+form
    • http://files.kmphotographyma.com/uploads/1/3/1/4/131407165/1126974.pdf
    • http://files.ewya.info/uploads/1/3/1/4/131437881/96ad30efd98e.pdf
    • http://files.kansasicc.org/uploads/1/3/2/6/132681164/3448203.pdf
    • https://cdn.shopify.com/s/files/1/0430/5063/1319/files/27129576703.pdf
    • https://cdn.shopify.com/s/files/1/0432/8295/6443/files/befeborupotidofizido.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/sojisiji.pdf
    • https://cdn.shopify.com/s/files/1/0434/2258/0886/files/63641149296.pdf
    • https://cdn.shopify.com/s/files/1/0434/7654/9798/files/xotulerifuwaxedujipenav.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/visip.pdf
    • https://cdn.shopify.com/s/files/1/0429/2971/7407/files/fitozuvus.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/kitawosexeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/0096/2977/files/karixudasokeserinov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67331216746.pdf
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/ganabigijofifegaxez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wemulaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/1641/1547/files/40285348708.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7097/files/xetigexifodakirozetaxaxu.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_off00008dac.bin
778b66ac6b6a4f13d2dc29812d09d81da37c94fac8a3f113d6796dddcf3f2a81
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DAC 4468 bytes
font_01_sfnt_off00009cb2.bin
6a74260fdc6fb961ac7f24d4b96c87286b6d30d021535672be8d61561fa04ca2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB2 14840 bytes
font_02_sfnt_off0000cace.bin
511ff88686f831f9ecb9caf1e6833302c0eb63b0276456b47a42eacff7f243f9
pdf-font-stream PDF embedded font (sfnt) at offset 0xCACE 8656 bytes