Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc062ba215b7d4d…

MALICIOUS

PDF

41.5 KB Created: 2020-08-21 06:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20b6326c51e3315e2bb297866eac0c41 SHA-1: ee1e22f7e6cffd4b7c991188e770ff1480d92216 SHA-256: 9fc062ba215b7d4d5bdb3c5e7baa520a56916ff984c0dd090164001164901bf9
154 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous embedded URLs, many pointing to Shopify, but one critical URL redirects to a known malicious domain (ttraff.cc). This indicates a social engineering attempt to direct users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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=pramananda+bahu+tula+song
    • http://files.wfcharborne.com/uploads/1/3/1/0/131070508/4080405.pdf
    • https://cdn.shopify.com/s/files/1/0433/3273/1030/files/powesalu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8098/2436/files/miwifoluv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/takuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/0950/7487/files/gowutikamereloget.pdf
    • https://cdn.shopify.com/s/files/1/0431/0571/4338/files/nozijumibixodegavej.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/moxoxozetoped.pdf
    • https://cdn.shopify.com/s/files/1/0430/3503/3757/files/40331832548.pdf
    • https://cdn.shopify.com/s/files/1/0427/9618/7815/files/osrs_earth_battlestaff.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6016/files/jorozikale.pdf
    • https://cdn.shopify.com/s/files/1/0428/5100/8671/files/jupegusiveresoxuj.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_off000064a0.bin
46125495f7883e63a418aa0014d754d82c738172fb4ec88cdc7b627b74e714fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A0 5380 bytes
font_01_sfnt_off000076a6.bin
09ad72a3405c310cb7daa6f780c906a91c54f8f4cbf5a84745c1e576d6b3e243		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76A6 10320 bytes

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