Malicious PDF — malware analysis report

Static analysis result for SHA-256 793c84e376ec9e96…

MALICIOUS

PDF

34.8 KB Created: 2020-08-31 00:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a212e29789e0066b47e4dfa52e87cb9 SHA-1: ccd3511078a94dc67c79e5486905637a1eeb5498 SHA-256: 793c84e376ec9e96d996a6ea08a598e9efa36d9866af8a6cacb817079ea6e02d
154 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to embedded links pointing to known redirector infrastructure. It also contains a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.com/wix?keyword=generacion+de+adoradores+pdf, which is likely used to funnel victims to further malicious content. No scripts were extracted, but the PDF structure itself indicates malicious intent.

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=generacion+de+adoradores+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_ad594a65393c49a3aa41a6095147bc87.pdf
    • https://static.usrfiles.com/ugd/234f58_d1fcc80242b14797b4461fd5cfc1f438.pdf
    • https://static.usrfiles.com/ugd/ba3095_2de2cf17ab7744d494120324d6657860.pdf
    • https://cdn.shopify.com/s/files/1/0431/0879/4525/files/88194321622.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/88765993164.pdf
    • https://cdn.shopify.com/s/files/1/0429/7211/9199/files/java_tutorial_for_beginners_netbeans.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/6251094996.pdf
    • https://cdn.shopify.com/s/files/1/0437/5478/2869/files/construction_cost_estimation_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/7404/4579/files/best_angularjs_viewer.pdf
    • https://cdn.shopify.com/s/files/1/0440/1420/7134/files/7308916401.pdf
    • https://static.usrfiles.com/ugd/906e9f_23ba8c74cd694c5fae0de0e374f6fee2.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c93cdf559994137aac924232026cf28.pdf
    • https://static.usrfiles.com/ugd/b8c837_c575e52dff6f467181dd5c68f6159dc2.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_off000049de.bin
3b523bc18aea511ad1af30eb35dd809c926111effd8c49d6a42b975d6fe3ce19
pdf-font-stream PDF embedded font (sfnt) at offset 0x49DE 5148 bytes
font_01_sfnt_off00005b70.bin
7bea5ef45dfabd5106363b84adf1a1a198305f4380a0e4897f71656b58374297
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B70 10348 bytes