Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb53e3692e863f3…

MALICIOUS

PDF

46.5 KB Created: 2020-08-31 10:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec623234cac9a659e3dccbf3daa66bce SHA-1: 8c02478c18439fb79e999fc35c857a7c819c6f3a SHA-256: 0cb53e3692e863f352576789c9d0bce1adb678a3f7eff86921e9856c51dea4d6
162 Risk Score

Malware Insights

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

The PDF contains a lure for a movie download, which redirects to a malicious URL identified as a redirector. It also exhibits characteristics of a PDF link farm, suggesting an attempt to distribute malicious content or engage in SEO manipulation. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/wix?keyword=journey+2+the+mysterious+island+in+hindi+full+movie
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/38901984387.pdf
    • https://cdn.shopify.com/s/files/1/0427/6905/5911/files/14924494986.pdf
    • https://cdn.shopify.com/s/files/1/0434/2471/0807/files/tixiwalukolo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7285/5957/files/film_semi_terbaru_2016.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6727/files/xevewexoge.pdf
    • https://cdn.shopify.com/s/files/1/0430/1943/6185/files/96860702929.pdf
    • https://cdn.shopify.com/s/files/1/0427/6187/9719/files/vernier_caliper_measurement.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/lalotekoxipizomut.pdf
    • https://cdn.shopify.com/s/files/1/0429/2352/4259/files/autodesk_alias_car_modeling_tutorial.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4af2f258bdf4113a4598dbf9bbdb43a.pdf
    • https://static.usrfiles.com/ugd/b42fd6_245672fdba8e4306a82e9bc447f12124.pdf
    • https://static.usrfiles.com/ugd/90423f_1ee417c04125407c9f6f1203587b7d89.pdf
    • https://cdn.shopify.com/s/files/1/0428/4959/9651/files/savotuvanoxezavusonojageb.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/leresanizadowovawidogaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/1566/6840/files/sabamogopeb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d39.bin
816fced3feeb9c238f59d296416bcb96c886ea322f6ed8b546367946e02bfd19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D39 5428 bytes
font_01_sfnt_off00007f8d.bin
0810ce0371bb48a6dbbb6c56d423a1e4bda4455f4638deeed9c91ec23a796c96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8D 1728 bytes
font_02_sfnt_off00008825.bin
5f8b00bd43b0b0a2b45e0d0b35932a4c013f3e1366150d576ac510f741b56e0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8825 10972 bytes

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