Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7e101b1b5d443de…

MALICIOUS

PDF

39.7 KB Created: 2020-08-21 01:00:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b021ab52037609dffd7fb6cca15dad47 SHA-1: 6499a070a3f20a788b14abd264b8429b9bc9b30d SHA-256: c7e101b1b5d443dea6aca72df13d36c01dd47393db50c5b4dbbff78f2698be37
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a lure for 'microsoft office mac 2011 crack'. The document body, though heavily obfuscated, also contains this URL and references to cracked software. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to attract search engine traffic, further supporting the lure. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=microsoft+office+mac+2011++crack
    • http://files.spokanedrumlessons.com/uploads/1/3/0/9/130969377/7e065.pdf
    • http://difowusup.kapalalau.com/uploads/1/3/1/3/131383483/11647f2.pdf
    • https://cdn.shopify.com/s/files/1/0437/5075/2417/files/ronezobokanovezijew.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1998/files/malixufune.pdf
    • https://cdn.shopify.com/s/files/1/0445/3344/8868/files/pros_and_cons_of_social_media_essay.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/xanoride.pdf
    • https://cdn.shopify.com/s/files/1/0461/9013/3406/files/vugutetarefo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8478/3509/files/darutasipomamof.pdf
    • https://cdn.shopify.com/s/files/1/0438/5911/6182/files/biblical_names_and_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0431/6931/7020/files/tepenami.pdf
    • https://cdn.shopify.com/s/files/1/0433/9649/7573/files/36349583424.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/vamamuvev.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1734/files/puwabufono.pdf
    • https://cdn.shopify.com/s/files/1/0433/8103/1064/files/befalepodujefikixipo.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_off00005005.bin
c47d1a2d8aee5df0c2a322a8fbd1c2db8fd35dc889540ae322e8ff6597169cc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5005 5072 bytes
font_01_sfnt_off00006144.bin
b008201ca4709dd1f793eff583948877b23b35cd64aa4431c88331e9826dca75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6144 10064 bytes
font_02_sfnt_off000083c9.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83C9 4324 bytes

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