Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c528080db622db…

MALICIOUS

PDF

39.8 KB Created: 2020-09-01 19:56:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8476faee7a745ce8600bd38859f2327 SHA-1: 30c669ba2b90e38615de9c0bdc5b797a66db1dc4 SHA-256: 00c528080db622db37f4208a914fa8048439a56687d228ceb0bf25781ef00b5c
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector to 'ttraff.com', indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the intent to lure users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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=lezginka+sheet+music
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0459/9401/6935/files/6345158265.pdf
    • https://cdn.shopify.com/s/files/1/0434/2143/4005/files/anything_but_ordinary_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0124/0992/files/kukozod.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/4765954393.pdf
    • https://cdn.shopify.com/s/files/1/0430/9126/3649/files/serufubaxarabugizipep.pdf
    • https://static.usrfiles.com/ugd/b91566_b994f6be252249a7b3f6b6ff00579d0d.pdf
    • https://static.usrfiles.com/ugd/b8c837_109c11e779594eff83c1b5f4ee0ce557.pdf
    • https://static.usrfiles.com/ugd/78c764_7aa23cb4d9b54a12b58650c071d0c181.pdf
    • https://static.usrfiles.com/ugd/b8c837_246c0046a4ab40f8b875618f3232a841.pdf
    • https://static.usrfiles.com/ugd/7a11b0_b030ba3b11074893b2ab0be873aa7b5c.pdf
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/10477684580.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/90586428344.pdf
    • https://cdn.shopify.com/s/files/1/0435/1767/3636/files/sexifafuwivewapizoroxa.pdf
    • https://cdn.shopify.com/s/files/1/0438/1186/4738/files/65794962509.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000489b.bin
a871b2c90e1e3406905e3c8f99e65b7ac217c2f00d587c2fa74667573182d5a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x489B 5140 bytes
font_01_sfnt_off00005a0b.bin
f5f3c4d7762b00eeb28434519180b85d76a9db7af15eaddf2beda542ad392c9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0B 10516 bytes
font_02_sfnt_off00007d6e.bin
15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6E 16120 bytes

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