Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e2999ea8ac01bc…

MALICIOUS

PDF

65.9 KB Created: 2020-08-20 09:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f55b48edf6f58f9b899ed9d2de832d0 SHA-1: 36d97c32db5f7890ae6974cd3bd490ad504e2a57 SHA-256: 94e2999ea8ac01bcdbb2538d65a17f0533422a10d56f9610126917b06efc22a5
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=lab+4+photosynthesis+answers'. The document body, though heavily obfuscated, contains text related to 'lab 4 photosynthesis answers', suggesting a lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to distribute malicious content. No scripts were extracted from this sample.

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=lab+4+photosynthesis+answers
    • http://gukuba.heavydutymarketing.com/uploads/1/3/0/8/130814761/wejojivajesa-sorexamu-gujetuwotiki-nabekomiluwi.pdf
    • http://files.wiast.org/uploads/1/3/2/8/132815882/533524.pdf
    • http://files.carlya2zmusic.com/uploads/1/3/1/0/131070493/4360601.pdf
    • https://cdn.shopify.com/s/files/1/0428/5821/7631/files/76754606599.pdf
    • https://cdn.shopify.com/s/files/1/0434/0505/0008/files/causes_and_consequences_of_ww1.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1927/files/66971558279.pdf
    • https://cdn.shopify.com/s/files/1/0434/2277/7496/files/79905444289.pdf
    • https://cdn.shopify.com/s/files/1/0430/7589/5450/files/nidigexudidosa.pdf
    • https://cdn.shopify.com/s/files/1/0434/8051/4713/files/activation_energy_diagram_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/8386/6018/files/47566522437.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/83706110512.pdf
    • https://cdn.shopify.com/s/files/1/0438/3876/7266/files/75861435261.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_off0000c3c1.bin
b3422a257d2482a4f7b070dece9ed6f0940a1a0172eb6f9503d6dda97a80c192		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C1 5236 bytes
font_01_sfnt_off0000d5a6.bin
bef52ff767fbe6b32ff3baf7db2ddf7c81c0997c67c43a062a3a167ee921a65f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A6 10952 bytes

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