Malicious PDF — malware analysis report

Static analysis result for SHA-256 1430827f9146fbf1…

MALICIOUS

PDF

54.7 KB Created: 2020-09-01 13:15:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7acb35c290f55b68e927528cde5b98c0 SHA-1: 96d0c88661700a9911394e771ee2d6d02556bb51 SHA-256: 1430827f9146fbf128c11802bcfdab8d9a712bfc9610b3a86a478ab6307abafc
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised with a keyword related to flowers. This suggests a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect the user to a compromised site or phishing page. The ML classifier strongly supports this assessment.

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=beautiful+images+of+flowers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/432b07_c88061f251324d6488ea97919b298ca2.pdf
    • https://static.usrfiles.com/ugd/868401_4090f484de8845de8baa60488ff7c9c3.pdf
    • https://static.usrfiles.com/ugd/57c819_be453ded136b4602b2177e568eb8df44.pdf
    • https://static.usrfiles.com/ugd/b8c837_46ffed815959402a96d0ae1f5e3eee2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fe114e92fed432bb41651a335f86c31.pdf
    • https://static.usrfiles.com/ugd/b8c837_32307e46f22b4d13a12dade640d34f83.pdf
    • https://static.usrfiles.com/ugd/b8c837_de645057731a4d4885797e5ec200911f.pdf
    • https://static.usrfiles.com/ugd/5cf23b_b55e7edca9e64b09a75702ebfe447fa6.pdf
    • https://cdn.shopify.com/s/files/1/0462/7690/3061/files/45956551348.pdf
    • https://cdn.shopify.com/s/files/1/0429/7018/5879/files/jokimemeti.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/nowodavigazofedafaze.pdf
    • https://static.usrfiles.com/ugd/2074c9_209fc98a93ee4338b81554886075530f.pdf
    • https://static.usrfiles.com/ugd/41a0b6_ba1a66ea78b34a848739e90fad707e6f.pdf
    • https://static.usrfiles.com/ugd/217d68_c1f5977637eb4f438631465b50d7766b.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f101c8895c3488fb6efeae3b08f62b0.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_off0000819c.bin
9749aa00edf08199eb9c27e0dd23b4d32f3da9f72e856fc144ce7e36c6cc24f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x819C 5228 bytes
font_01_sfnt_off00009367.bin
6c80779f134a0025cacc75e3114aecd1bd19c312d19ffb9afab92bb0f8a0ded7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9367 10324 bytes
font_02_sfnt_off0000b6c3.bin
cf3d694c3e041eec2a7424ffe04d92d9f1a1918579fded458a98c1e54fe68773		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6C3 16820 bytes

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