Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ebb0d6a361e65ca…

MALICIOUS

PDF

39.2 KB Created: 2020-08-29 20:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81fed6984ece3b6b1da84794e24af49c SHA-1: c03755be5508d12ec9363d011cc5cf668bc9ee4d SHA-256: 0ebb0d6a361e65caad56e982ab1eaf24a0697371c85c2630832985dbd7bf79d8
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, which is likely used to funnel victims to malicious content. The document body and embedded URLs suggest a link farm or SEO poisoning tactic, aiming to disguise malicious links within seemingly legitimate PDF documents. The ML classifier strongly indicated maliciousness, supporting the presence of malicious redirectors and link farms.

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=t%25C3%25BCrk+dili+ve+kompozisyon+bilgileri+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/mnemosyne_mnemosyne_no_musume_tachi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8368/5270/files/medovat.pdf
    • https://cdn.shopify.com/s/files/1/0436/6378/6137/files/64051763827.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7271/files/jitabiw.pdf
    • https://cdn.shopify.com/s/files/1/0434/1530/6405/files/nunakitapukavijufutajepi.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_a5939f6b7e964c51adcebc4329b1c2ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_b795ef5f06474cda8c10d76bfa098e23.pdf
    • https://static.usrfiles.com/ugd/b8c837_ae06218149b2448b9d8164d7cf604aa0.pdf
    • https://static.usrfiles.com/ugd/b8c837_51de7105e05e4e798e6da468956b3eb4.pdf
    • https://static.usrfiles.com/ugd/0adedf_43e8e8517cf54046b85d612ad4805365.pdf
    • https://static.usrfiles.com/ugd/a107db_0b3a18a723f84bc08de2f03a28a01e42.pdf
    • https://static.usrfiles.com/ugd/b8c837_b3c6ca8ab3c047ce8bc65f36f4d9e784.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f081abeecd44937b1d33a71207e0eb8.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5c39ae288aa48338b4977a89dcd2e02.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_off00005646.bin
873868b7b4f336ffa24170ff7bb1903c440cb68834efe08cb5fc8c6804e4b75f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5646 5636 bytes
font_01_sfnt_off0000693c.bin
dc3456077a77c830083b1f15b804a96f345e6ef8697cfa179cfe16812aad5a30
pdf-font-stream PDF embedded font (sfnt) at offset 0x693C 11516 bytes