Malicious PDF — malware analysis report

Static analysis result for SHA-256 afafccb328b39c15…

MALICIOUS

PDF

47.4 KB Created: 2020-08-29 23:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9292a14e7aa1bd3ade676ac71e6c5fd SHA-1: a4033d8298217926e0d5e3cf842352669b90c9d8 SHA-256: afafccb328b39c1540829fe8c80458ec0bf69ca74f45549d22b08036c4d00cf7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.com/wix?keyword=dresden+files+peace+talks+chapter+1+download'. The document body, though heavily obfuscated, contains text related to 'dresden files peace talks chapter 1 download', suggesting a lure to trick users into clicking the malicious link. The presence of numerous other PDF links, many hosted on cdn.shopify.com, indicates a link farm strategy, likely to obscure the malicious destination. The ML classifier strongly flagged this PDF as malicious.

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=dresden+files+peace+talks+chapter+1+download
    • https://static.usrfiles.com/ugd/b8c837_c8c1bc41e10746d79bf21bba238b3015.pdf
    • https://static.usrfiles.com/ugd/b8c837_0abb086997794cdb867f6fd60c66575f.pdf
    • https://static.usrfiles.com/ugd/2ca09c_12e1392b818746a786c71c950374c9ea.pdf
    • https://cdn.shopify.com/s/files/1/0435/1308/6106/files/5980382078.pdf
    • https://cdn.shopify.com/s/files/1/0437/3485/9930/files/anandam_amma_ente_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/2812/5595/files/lijetevidofujaku.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8775/files/884188770.pdf
    • https://cdn.shopify.com/s/files/1/0437/1267/5990/files/50952331667.pdf
    • https://cdn.shopify.com/s/files/1/0439/8972/9438/files/neoplasia_maligna_de_pancreas.pdf
    • https://cdn.shopify.com/s/files/1/0434/5479/1846/files/kadiluselomexike.pdf
    • https://cdn.shopify.com/s/files/1/0435/0047/0438/files/gefobunemolazok.pdf
    • https://cdn.shopify.com/s/files/1/0433/6851/3686/files/java_runtime_environment_1._7_32_bit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wopesutokuvikoku.pdf
    • https://cdn.shopify.com/s/files/1/0432/3658/9730/files/nonidagekubidibijufowe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1142/files/20684991904.pdf
    • https://cdn.shopify.com/s/files/1/0433/1087/4777/files/xemajudixidamijagili.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/5410888159.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a7e.bin
e5466a3cf283a92e0c181a47d3f66fe32781d2dd7dc4bf2112a7f8f6f0f6a1b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7E 5452 bytes
font_01_sfnt_off00008d14.bin
c4b580b9a780a5ad6cd391117904e796d22399cc05760466d85109288646f425		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D14 10428 bytes

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