Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab91dc5ef35e1a26…

MALICIOUS

PDF

33.9 KB Created: 2020-08-17 04:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb3d457bd831ca921f38bb036c8883e1 SHA-1: 8de0961136ea8bcfb9735ac776829accb1e7f980 SHA-256: ab91dc5ef35e1a26519f9fe1e6a93debf8990043876698182219e70402e01977
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, likely for SEO manipulation or to host further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=free+animated+candle+gif
    • http://files.get2steeping.com/uploads/1/3/1/6/131636995/kezotubijirolenofar.pdf
    • http://files.adsregion11.org/uploads/1/3/2/6/132695698/fe175f952.pdf
    • http://files.honour-our-troops.org.uk/uploads/1/3/0/7/130776852/b375fde60b5621.pdf
    • http://xiwegi.newbethelbaptistga.com/uploads/1/3/0/8/130874493/nilolena.pdf
    • https://cdn.shopify.com/s/files/1/0433/4485/5194/files/vba_list_all_sheets_in_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/dorerevuvotusekorepabe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6593/3973/files/33449739475.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/tiwuwifig.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/6829723225.pdf
    • https://cdn.shopify.com/s/files/1/0433/8522/5372/files/954484531.pdf
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/boss_me_25_manual_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48054684450.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/77550157076.pdf
    • https://cdn.shopify.com/s/files/1/0434/4800/8866/files/lulijineperivibezereme.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/manufacturing_engineering_and_technology_6th_edition.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_off000048e8.bin
613dbbef75ccb9d5807e67cdc8f42da0dd8abcb8ddadddd8b8301f8a5cd5b0a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48E8 5120 bytes
font_01_sfnt_off00005a34.bin
96770adb20206a7df3a416b3ac457c16c460dac26c13b33a30538124e9feacae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A34 9672 bytes

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