Malicious PDF — malware analysis report

Static analysis result for SHA-256 0873698a61ee663e…

MALICIOUS

PDF

57.0 KB Created: 2020-08-29 14:27:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a7fd062dc38cc2a50a407da41f3cc8f SHA-1: 53c0a9c4e7c5036d32ee3f67b89cc969b7c2b697 SHA-256: 0873698a61ee663e45b5e7fe5f4f0d7b77fe98dabb5fc7bd9fe528a9e9362bad
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for 'current affairs' related content, suggesting a phishing or malware distribution attempt. The presence of numerous external links, many of which are benign, indicates a link farm strategy to obscure the malicious destination.

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.com/wix?keyword=current+affairs+june+2019+pdf+affairs+cloud
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/26481d_bfa3d05207d44ad48c40654e83de0af9.pdf
    • https://static.usrfiles.com/ugd/b8c837_e1aa8c06de6f4350ba4ba10d481d326e.pdf
    • https://static.usrfiles.com/ugd/b8c837_14170206c1c74eaca49206bd59230354.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c8bc529c4e34f1496d0b4591b5addac.pdf
    • https://static.usrfiles.com/ugd/b8c837_39819be299b749e4a93c58badf226a85.pdf
    • https://static.usrfiles.com/ugd/b8c837_5db661ed29924d9ea51d8550b1656f17.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1b6ad2dd5b0418cac45e59abcc4f372.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ba0899f1c3b4c5b88aad73add6155e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_352760b18915450b8498e5fa2d09abc4.pdf
    • https://static.usrfiles.com/ugd/b8c837_838b1f6d921a45f588b90eeb6c1afaef.pdf
    • https://static.usrfiles.com/ugd/b8c837_a9006dcd00db4a1ba164894ddcfa0059.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c3477ab6c604913a677fe73fbc213ad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/pawodivukirirutumobus.pdf
    • https://cdn.shopify.com/s/files/1/0439/5175/1336/files/21666737641.pdf
    • https://cdn.shopify.com/s/files/1/0437/1926/2363/files/apollos_priestess_crossword_clue.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009f7c.bin
a9fe6fae57e8eff7b5162ff6c0e77d58330ff3d8e2b802761af427e1d055afab
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F7C 5612 bytes
font_01_sfnt_off0000b2a1.bin
5ddf29c6ca956ea1299376ced69d325452bad998fe23914058b6254169b3c01e
pdf-font-stream PDF embedded font (sfnt) at offset 0xB2A1 10500 bytes