Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a3e05a68e3d73e0…

MALICIOUS

PDF

55.5 KB Created: 2020-08-24 06:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b843a36d82401cb117e11e0efac8b38b SHA-1: 5f28bd348ef4657b6e9368a6091e5bd23aafc93e SHA-256: 8a3e05a68e3d73e09c7a584573297591a4e2426eeecff75a6e16ae11357a9184
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=answering+the+phone+in+french', suggesting a lure to a malicious site. The presence of multiple PDF links, many hosted on Shopify, indicates a link farm designed to obscure the true malicious destination.

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.ru/pify?keyword=answering+the+phone+in+french
    • http://vipowoxoz.pioneervalleykennelclub.com/uploads/1/3/2/3/132302842/zonadonan-kotemafidu-komolibur.pdf
    • http://files.pondviewfarmmaine.com/uploads/1/3/1/4/131452811/448e1c085cb2a6.pdf
    • https://cdn.shopify.com/s/files/1/0434/3631/0678/files/55678043163.pdf
    • https://cdn.shopify.com/s/files/1/0435/3880/8991/files/70751897731.pdf
    • https://cdn.shopify.com/s/files/1/0432/7312/6052/files/jatagikuderebolubezixe.pdf
    • https://cdn.shopify.com/s/files/1/0428/3616/4774/files/lezosupejenemikobej.pdf
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/probability_and_statistics_notes_for_mca.pdf
    • https://cdn.shopify.com/s/files/1/0448/7577/6167/files/carnot_theorem.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/momafured.pdf
    • https://cdn.shopify.com/s/files/1/0437/1618/2166/files/remove_blank_pages_from_adobe_reader.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1254/files/better_villagers_mod.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/depodezadomojezopidun.pdf
    • https://cdn.shopify.com/s/files/1/0431/6967/7474/files/alice_in_wonderland_text_file.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/xifukunid.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_off0000880e.bin
ecbff858200c8556ea1aa5c3f398c6032ac315326e2af2281471c7c247ff7b51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x880E 5116 bytes
font_01_sfnt_off00009989.bin
812408268ee1e819e05363af5c78132e98de9168eb57049ee9641f2b48efaa25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9989 9920 bytes
font_02_sfnt_off0000bbc8.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC8 16204 bytes

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