Malicious PDF — malware analysis report

Static analysis result for SHA-256 a58ecb9d44bcb13a…

MALICIOUS

PDF

32.8 KB Created: 2020-08-12 02:26:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c65b49f3817a6e7b3f17be216a81c9e SHA-1: c6c8d4018529773ba5f1b5515c56f7c089beb7f6 SHA-256: a58ecb9d44bcb13a2da17384b0170db4432cff22bab540ff0c9ec455ef493d1d
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, with one critical heuristic identifying it as a malicious redirector. The document body, though heavily corrupted, contains text related to 'Pearson physics textbook answers pdf', suggesting a lure to disguise malicious links. The primary malicious IOC is the URL 'https://ttraff.ru/pify?keyword=pearson+physics+textbook+answers+pdf', which is linked to known malicious redirector infrastructure.

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.ru/pify?keyword=pearson+physics+textbook+answers+pdf
    • http://files.lanagates.com/uploads/1/3/0/7/130775825/zaneredikajolawaba.pdf
    • http://files.alisonpilkington.com/uploads/1/3/0/9/130969710/4333994.pdf
    • http://files.leiladyamy.com/uploads/1/3/0/9/130970003/duvukedosafa.pdf
    • https://cdn.shopify.com/s/files/1/0434/7530/4612/files/tuwulipiwutopabubu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6718/7108/files/43628970793.pdf
    • https://cdn.shopify.com/s/files/1/0434/6816/1184/files/online_translate_chinese_to_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/8362/8697/files/16095517660.pdf
    • https://cdn.shopify.com/s/files/1/0433/4977/0408/files/mugozejetadawituge.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pesaveput.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/migunege.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/jibuxawuzi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/32936052851.pdf
    • https://cdn.shopify.com/s/files/1/0433/6589/2264/files/60394180387.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0497/files/titesoxebibosawofogavoti.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_off000042e6.bin
bdca5fb5db2286d97abc54a384c83d41d20ee86dc646a0d6c8ec1098371a3eaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42E6 5676 bytes
font_01_sfnt_off00005643.bin
621cca413d49d659e2461c747fa9031bcb2c03890edbf19ee93154de88f8e5e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5643 9556 bytes

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