Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d157d35b208fb86…

MALICIOUS

PDF

96.9 KB Created: 2020-08-06 14:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 464bdb95762eb810f9fc2859c55249ec SHA-1: 56e2e3d80f7f85a2c7ead35ff973e9dd5cdf4dd6 SHA-256: 4d157d35b208fb86afedad265c5c3a1d9382dda8ea3e9fa5129b6b2a22a0f5c1
120 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to 'https://ttraff.cc/pify?keyword=arm+cortex+m4+programming+pdf'. This link is designed to lure users into downloading further malicious content. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility.

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=arm+cortex+m4+programming+pdf
    • http://files.hannaryynanen.com/uploads/1/3/1/0/131070938/wezolawef.pdf
    • http://files.kelleysbluegrassdanes.com/uploads/1/3/1/4/131407530/volasidop_mavejux_podelumunux_xumasojaxugoxu.pdf
    • http://files.apostolicdeliverancefive.org/uploads/1/3/0/7/130775434/344824.pdf
    • https://cdn.shopify.com/s/files/1/0438/0409/8722/files/english_to_arabic_vocabulary.pdf
    • https://cdn.shopify.com/s/files/1/0434/6462/2246/files/down_jay_sean_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/29883879229.pdf
    • https://cdn.shopify.com/s/files/1/0432/9704/6696/files/31356253517.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/pitewo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/ethnographic_thesis.pdf
    • https://cdn.shopify.com/s/files/1/0433/9433/4869/files/28638782728.pdf
    • https://cdn.shopify.com/s/files/1/0434/9342/5316/files/77937374254.pdf
    • https://cdn.shopify.com/s/files/1/0435/6544/9371/files/44989178685.pdf
    • https://cdn.shopify.com/s/files/1/0434/6917/6992/files/58406397768.pdf
    • https://cdn.shopify.com/s/files/1/0430/5308/8919/files/insert_blank_page_acrobat_pro.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_off000111ae.bin
61ad1dd63cc150433828b2c59581407b7e887e43892f9dcf8e6f56752d4551f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111AE 9724 bytes
font_01_sfnt_off000130f1.bin
f2b4b3b322eca8aa8df025121c8f4548ca17652c73c551dcd1c7a81bc1a5a222		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130F1 5412 bytes
font_02_sfnt_off00014355.bin
2e23f6433a41703b555e29da32adc06c28cf92583c9eb1823667fa630fe3863a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14355 16504 bytes

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