Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed7a906d7d2bf26…

MALICIOUS

PDF

63.4 KB Created: 2020-08-06 11:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2302561a30778ab3af912d9ae46c8482 SHA-1: fd67b2ac03599f4a31d9096d9322ac8702490af2 SHA-256: 1ed7a906d7d2bf2680510b3fc09fe27972fa3c3d5073a72898a6923a5e8ada84
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with a primary malicious redirector URL disguised as a "current affairs pdf". The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates the link at https://ttraff.cc/pify?keyword=bankers+adda+august+month+current+affairs+pdf is known to lead to malicious infrastructure. The document body, though heavily obfuscated, contains this URL and other links, suggesting a social engineering attempt to trick users into clicking through to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=bankers+adda+august+month+current+affairs+pdf
    • http://files.thewanderers.org.au/uploads/1/3/0/7/130775831/fe5df.pdf
    • http://files.retterermoore.com/uploads/1/3/1/1/131163512/7948750.pdf
    • http://files.4055nelsonavenue.com/uploads/1/3/0/8/130874180/peninobodode.pdf
    • http://files.mhktesoro.com/uploads/1/3/0/8/130873794/9566537.pdf
    • https://cdn.shopify.com/s/files/1/0435/5912/5160/files/gubumulepifejenas.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7303/files/ringtones_for_kids.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/bijadijigefuzuridibi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5038/6079/files/68791285255.pdf
    • https://cdn.shopify.com/s/files/1/0433/9616/9886/files/2008_vw_beetle_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/1448/7207/files/entrepreneurship_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/fabuzasewibisegole.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0843/files/project_report_on_swot_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76640573288.pdf
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/8_bit_adder.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/lawitibexiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/tunija.pdf
    • https://cdn.shopify.com/s/files/1/0434/4047/2214/files/gedozivofulujukife.pdf
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/gijizosazenup.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000cb3e.bin
80042e3e84691b2efac605ad9cd8a237be083f7f04fd08ea50370399038ac1a9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCB3E 11660 bytes
font_00_sfnt_off000088e1.bin
dd7409e68e185bbde58dd45f0f91f762d489b426df1f41a79f919bacbab852aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88E1 5648 bytes
font_01_sfnt_off00009bf7.bin
d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BF7 3720 bytes
font_02_sfnt_off0000a75a.bin
ae481d8c3d623f37968e4aac3a6c4afae2e567c4ebe56cbd01f72e58f80f3103		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA75A 10488 bytes

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