Malicious PDF — malware analysis report

Static analysis result for SHA-256 734bab527e2ec4a4…

MALICIOUS

PDF

49.7 KB Created: 2020-08-31 08:50:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f561451447c8103e0a8aa63315025ff SHA-1: 9d45b3e8f4f3f324a7aa922d8fd27c46dee6ff59 SHA-256: 734bab527e2ec4a42476290ba95107ecd851c90f0523a1030d4da107f64e95d9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'Fallout 4 nuka world guide' and a URL that appears to be a lure. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating an attempt to drive traffic to potentially harmful sites.

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.cc/wix?keyword=fallout+4+nuka+world+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/3aca14_7e100b6947624c618eb842a55e8a606a.pdf
    • https://static.usrfiles.com/ugd/b8c837_cec04c638e034c9bb057eca5ea089791.pdf
    • https://static.usrfiles.com/ugd/5ad03d_f1543fbd060d4263a30a6a41c2370e33.pdf
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/69369132149.pdf
    • https://cdn.shopify.com/s/files/1/0440/0129/6534/files/wufabugeximuf.pdf
    • https://cdn.shopify.com/s/files/1/0439/4595/1400/files/94599242142.pdf
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/miwezelototawagimidazapig.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/precalculus_mathematics_for_calculus_7th_edition_online.pdf
    • https://static.usrfiles.com/ugd/b8c837_37196bf6334d4812a167b5876e12accf.pdf
    • https://static.usrfiles.com/ugd/b8c837_0615030b34e94baab4a6cb96bc143ad6.pdf
    • https://static.usrfiles.com/ugd/756799_71f32f5c513b47839a11cd9e7e9b22d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2a53d74d6314b2a846eda4372a4e479.pdf
    • https://cdn.shopify.com/s/files/1/0440/0817/7822/files/aerial_lift_platform_accidents.pdf
    • https://cdn.shopify.com/s/files/1/0435/4922/9220/files/86978094325.pdf
    • https://cdn.shopify.com/s/files/1/0434/3375/4785/files/72782546416.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_off00007843.bin
19b54789f4318983d31e66ed4f639cf8dfcd488894cda92aaaffa8b928369ed1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7843 4896 bytes
font_01_sfnt_off0000890e.bin
76069747d1ddc4c07ea9ace1de3a644ae7f6cd79a3761d4e7f961b7a97ccb190		 pdf-font-stream PDF embedded font (sfnt) at offset 0x890E 10200 bytes
font_02_sfnt_off0000abc6.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABC6 4324 bytes

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