Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b227cd04863c38b…

MALICIOUS

PDF

53.6 KB Created: 2020-07-27 22:51:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f8cae9d3191999e010bb2131ad4a81c SHA-1: 26618c39a2b0f2bfaa3f169d3e4c2295cb6fd7a9 SHA-256: 1b227cd04863c38b7179675abf16fd4448b1f5e6a59a53e079cc55ab1036cd96
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. This URL is likely part of a phishing or scam campaign, attempting to trick users into visiting a malicious site. The document body, though heavily obfuscated, contains strings related to 'Microsoft office access database engine 2013' and 'wkhtmltopdf', suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or redirection strategy.

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/pify?keyword=microsoft+office+access+database+engine+2013
    • http://files.digitalliteracycookbook.org/uploads/1/3/0/7/130738928/f95bac749cb9b6.pdf
    • http://files.promoteaboveworld.com/uploads/1/3/1/0/131069763/610b5e86459.pdf
    • http://files.radiationconsult.com/uploads/1/3/0/7/130775299/444246.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6161/files/fadilunaludodupetok.pdf
    • https://cdn.shopify.com/s/files/1/0429/5357/2515/files/52186726819.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69143450337.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/5257346609.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8402105605.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/26843922449.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/52418406052.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/25834438335.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/dotixarejuxazavuliti.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/96635943381.pdf
    • https://cdn.shopify.com/s/files/1/0434/6901/3144/files/72334074796.pdf
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/xevor.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47184882359.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/
    • https://cdn.shopify.com/s/files/1/0433/068

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007086.bin
f93277a84c49c3fdb591b088582a00f8bb2a7cc6abe90b6579c32ca629e54991		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7086 11024 bytes
font_01_sfnt_off00009343.bin
a7fac0392aedc3be6fc40b60f601c88a4a2b8860a98237b18f71f5854515ad9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9343 5580 bytes
font_02_sfnt_off0000a64d.bin
55c79132baea7a60b5594490ba89ab33406081e584bd5d9e19d2761f8cede7f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA64D 10024 bytes

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