Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d65d62da1f115b6…

MALICIOUS

PDF

39.6 KB Created: 2020-08-30 08:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbb60676139fc15764b06603905b04ce SHA-1: 9b20265d41afd5f07d2e4a0c340aa05fee87dbeb SHA-256: 7d65d62da1f115b65da254f6c2793ab019fc78cd1bd1e1b1bbde0c0f578a2162
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a known malicious domain, ttraff.com. The document body, though heavily obfuscated, contains text suggesting a lure related to a movie title ('Nea marin miliardar online subtitrat in engleza') to entice users to click the malicious link. The PDF also contains a large number of embedded links, many pointing to Shopify domains, which are likely part of a link farm to improve SEO for the malicious redirector.

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=nea+marin+miliardar+online+subtitrat+in+engleza
    • https://static.usrfiles.com/ugd/902d29_341e914b60b949ef988cee79650ebb6b.pdf
    • https://static.usrfiles.com/ugd/e3834b_2a38640c873f4b2c8c7a99f20b0fa7fb.pdf
    • https://static.usrfiles.com/ugd/4dd980_80e6ddadf100480f936763236a746b72.pdf
    • https://static.usrfiles.com/ugd/4b874d_9e5af9617e184b33808e399cd31ee673.pdf
    • https://static.usrfiles.com/ugd/c3548c_4d03b6a23dd8442bae0d381b34dfb2e7.pdf
    • https://cdn.shopify.com/s/files/1/0430/0079/1191/files/38779753103.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3496/files/gupewako.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0120/files/sonam.pdf
    • https://cdn.shopify.com/s/files/1/0429/9289/4115/files/57787837420.pdf
    • https://cdn.shopify.com/s/files/1/0433/8660/1639/files/case_580_backhoe_parts_manual.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_1355a97890eb4d17873b85a059e29c0e.pdf
    • https://static.usrfiles.com/ugd/3b47cb_e4ce253b167f43f582a4561ed3cf5557.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9a42f47445e48849989b37a702e4ada.pdf
    • https://static.usrfiles.com/ugd/a86d68_5882fb6d33e24522ad69eb0a355d40e5.pdf
    • https://cdn.shopify.com/s/files/1/0433/9220/4950/files/lufosog.pdf
    • https://cdn.shopify.com/s/files/1/0435/4847/5541/files/binotizonimurizuvumuso.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7679/files/fundamentals_of_electrical_electronics_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0432/1856/7335/files/primer_of_public_relations_research_third_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/6442/5634/files/16289941720.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f5c.bin
f5af455af78077c6a8195c8559dfbdeff7d1e9e1693264f9a209694587767a3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F5C 5188 bytes
font_01_sfnt_off000060e2.bin
013513ab894b19eef457f833910be24c45d1d4c8139355b4accfbb75f36a751b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E2 10000 bytes
font_02_sfnt_off00008322.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8322 4324 bytes

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