Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a44ef2b77ffcfc…

MALICIOUS

PDF

42.6 KB Created: 2020-09-01 08:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4484161a05845f342bb79caf51d2609d SHA-1: 627ee50af53315864a3d718fdaad881cac422a6b SHA-256: 36a44ef2b77ffcfce4829d504de4e9d8979d7cad128f00fc9cc888bc647235b5
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting it is a 'Rockwell hardness test lab report', likely a lure to encourage clicks. The PDF also contains a large number of external links, characteristic of SEO link farm techniques.

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.me/pify?keyword=rockwell+hardness+test+lab+report+pdf
    • https://static.usrfiles.com/ugd/affaa6_915f174d488f4928b58a591804aad2ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc080baa162646358e8b757e5896221d.pdf
    • https://static.usrfiles.com/ugd/850f07_1e432e6094c4418baec5d5a0b89cc117.pdf
    • https://static.usrfiles.com/ugd/97493d_b68ccd78251849f7900f48c55cdb488b.pdf
    • https://cdn.shopify.com/s/files/1/0433/4167/6694/files/15305416792.pdf
    • https://cdn.shopify.com/s/files/1/0441/2129/2952/files/general_chemistry_4th_edition_mcquarrie.pdf
    • https://cdn.shopify.com/s/files/1/0435/8461/8653/files/23542926340.pdf
    • https://cdn.shopify.com/s/files/1/0452/5624/5408/files/apprendre_le_chinois_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/wexifopit.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb946090db084202ac0bb0505b1865fd.pdf
    • https://static.usrfiles.com/ugd/c6ac46_46549ec144d84fe0a6e6f5e74d5590f2.pdf
    • https://static.usrfiles.com/ugd/1cc777_50ef914c8c1d433aa9da3a0fc620e61a.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d9449bcc04a4a73972dae8474ec9713.pdf
    • https://cdn.shopify.com/s/files/1/0452/0555/3303/files/murokolunotejit.pdf
    • https://cdn.shopify.com/s/files/1/0430/9693/2505/files/tajefubi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8379/1517/files/nedekavadewugus.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_off000066f6.bin
00c1570ef2f2dba3132dd4c2337d7c11bcdce28e73762e36185d6e3f7296ee5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F6 5548 bytes
font_01_sfnt_off000079e4.bin
aa69f091a9f640fdda802480dabc8cb8b6e2c31569f6e29e6b381ac492fd2b41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E4 10272 bytes

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