Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc7c4f8f5679a57…

MALICIOUS

PDF

32.2 KB Created: 2020-08-14 21:06:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8cdd13af29abada71d5cca11c6183fc SHA-1: 2800b28374513737a05c47a86c55dd3874b487f6 SHA-256: fcc7c4f8f5679a574ad33a902ac322d88c6b01eeef309212cbcb439c1b7527c5
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a worksheet, aiming to trick users into clicking it. The ML classifier strongly supports maliciousness. The document body, though heavily obfuscated, contains the malicious URL and numerous other links, many hosted on Shopify, likely part of a link farm to obscure the malicious destination. The primary malicious URL is https://ttraff.cc/pify?keyword=kwl+chart+worksheet+pdf, which redirects to other potentially malicious sites.

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.cc/pify?keyword=kwl+chart+worksheet+pdf
    • http://vogimer.performingartsworkshops.org/uploads/1/3/0/8/130813848/xavepovixojade.pdf
    • http://mavosad.newlifebaptisthp.com/uploads/1/3/1/4/131483281/8208755.pdf
    • https://cdn.shopify.com/s/files/1/0434/7795/8822/files/ritofigitewun.pdf
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/71603826499.pdf
    • https://cdn.shopify.com/s/files/1/0437/4737/7301/files/nilukugewezamezakux.pdf
    • https://cdn.shopify.com/s/files/1/0445/3256/4132/files/wrist_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/9056/6556/files/83504770108.pdf
    • https://cdn.shopify.com/s/files/1/0437/5199/7592/files/76861165336.pdf
    • https://cdn.shopify.com/s/files/1/0434/0452/5720/files/vuvorozisivolese.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3762/files/python_2._7_9.pdf
    • https://cdn.shopify.com/s/files/1/0435/1826/3448/files/money_banking_and_finance_book.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_off000042e9.bin
e0b571b0b0f3f1bc58a9ecd7b674ecd07a70aedde2181292fd8e1dabd99b2ce0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42E9 5368 bytes
font_01_sfnt_off0000552f.bin
c3c4e56bd51e4988d0d9da97802d758c35482b065767fd809ad4aacab18f510e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x552F 9240 bytes

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