Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b7cce329b372047…

MALICIOUS

PDF

39.2 KB Created: 2020-08-19 01:36:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07645fea17a934e01b1d435ec185c519 SHA-1: 0b2e88e2726fed0cc68cc266f81ec51bc1abdc01 SHA-256: 4b7cce329b372047b4e7f648fa56337fb01e85abc239e86de15297377a4df80c
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector (ttraff.cc). The document body, though partially corrupted, suggests a lure related to 'Manageengine application manager installation guide'. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious redirector. 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=manageengine+application+manager+installation+guide
    • http://files.sueglass.com/uploads/1/3/1/3/131383483/9043657.pdf
    • https://cdn.shopify.com/s/files/1/0434/1048/9496/files/livre_pour_apprendre_la_langue_le_franais.pdf
    • https://cdn.shopify.com/s/files/1/0430/6550/8002/files/mejolupujalujemagura.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9703/files/lepur.pdf
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/99995462048.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/joxoxonurojijataniwigob.pdf
    • https://cdn.shopify.com/s/files/1/0429/7578/9215/files/telobigu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/98559133785.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/94099923579.pdf
    • https://cdn.shopify.com/s/files/1/0431/1180/9190/files/how_does_push_to_talk_work.pdf
    • https://cdn.shopify.com/s/files/1/0432/5949/4555/files/30109176248.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_off00005a1b.bin
f04a0adc41710a2ed21957425984615c0462facf2545adade4464315e100a271		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1B 5396 bytes
font_01_sfnt_off00006c57.bin
e53aeb3ec707571eb9044e97ec86b8124e69281998c1a3316181b09d5e6ac183		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C57 10388 bytes

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