Malicious PDF — malware analysis report

Static analysis result for SHA-256 befb9820badd217d…

MALICIOUS

PDF

40.5 KB Created: 2020-08-31 03:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd07e03fba82f8b0d05c173246e9e4eb SHA-1: 51817da14d29de6dfe0d22080db7f9a3695a4ed0 SHA-256: befb9820badd217df61a68f52892a679bef752aed3ba12f3c6ca01e0bb86760b
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a link to 'ttraff.com' which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the same URL and mentions 'granny simulator apk', suggesting a lure. The PDF also contains a large number of links to other PDFs hosted on Shopify, likely part of a link farm to improve SEO for malicious content. The presence of a visual download button further supports the social engineering aspect.

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.
  • 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
  • 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=granny+simulator+apk
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/96701948665.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/lejijira.pdf
    • https://cdn.shopify.com/s/files/1/0432/8561/0654/files/85863036027.pdf
    • https://cdn.shopify.com/s/files/1/0430/0826/2297/files/4_color_personality_test.pdf
    • https://cdn.shopify.com/s/files/1/0440/7921/8840/files/14557246581.pdf
    • https://cdn.shopify.com/s/files/1/0429/0953/2316/files/xirubuzavaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78985131446.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3763/files/50492856238.pdf
    • https://cdn.shopify.com/s/files/1/0459/1946/9717/files/zubifomuwakupezom.pdf
    • https://static.usrfiles.com/ugd/9a242c_7029ef8b66fd455b976c1a0d5acba3b4.pdf
    • https://static.usrfiles.com/ugd/8acad3_047c71f3d37f4798be40e3726892dae8.pdf
    • https://static.usrfiles.com/ugd/b8c837_25fb06fc31ca45c497ebd6c8e5f6d853.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_off000057fd.bin
b06ad418c5f258b70468880e2039ba5b379760005728b7f5c192db1a8892389e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57FD 5164 bytes
font_01_sfnt_off0000697b.bin
0b84f7fc08f669dcdd29db2a513facc990d92aadb0b0327d7c62e0c91de0d5da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x697B 1848 bytes
font_02_sfnt_off0000727c.bin
881ecef15d26865a771d43c69235f5d2b7860767b086556b8fa7105a9f4cb61e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x727C 10200 bytes

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