Malicious PDF — malware analysis report

Static analysis result for SHA-256 281d39cb40bed5a6…

MALICIOUS

PDF

42.8 KB Created: 2020-08-04 23:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80744b9c249580dce5273c2a4c903712 SHA-1: 4821a6609ac08f5476743272fb31872fc2fdec34 SHA-256: 281d39cb40bed5a618c02f8d58718dc98358bdadbd3a37a9db9716a7bee30989
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL is 'https://ttraff.com/pify?keyword=architectural+design+brief+sample+pdf'. This suggests the document is designed to trick users into visiting a malicious site, likely for phishing or malware distribution. No scripts were extracted, and the document body was heavily corrupted, limiting further analysis.

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.com/pify?keyword=architectural+design+brief+sample+pdf
    • http://files.madameburnett.com/uploads/1/3/0/7/130775845/8298669.pdf
    • http://files.zhiguohe.com/uploads/1/3/0/7/130775304/20b19caba8.pdf
    • http://files.carolinastormhedgehogs.com/uploads/1/3/1/6/131637291/fanipewonosewagafuv.pdf
    • http://files.scacademyofauthors.com/uploads/1/3/0/9/130969503/6049361.pdf
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/31706182775.pdf
    • https://cdn.shopify.com/s/files/1/0430/4456/9242/files/1479443273.pdf
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/camino_de_santiago_frances_en_bici.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/birumewifegetepewifad.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/gimiz.pdf
    • https://cdn.shopify.com/s/files/1/0439/4965/4184/files/zizigonesevirerijebuleku.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/design_patterns_examples_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0435/7718/0328/files/jajofeje.pdf
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/95936166737.pdf
    • https://cdn.shopify.com/s/files/1/0431/1010/5255/files/bashir_badr_poetry.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fodafozisejuleluz.pdf
    • https://cdn.shopify.com/s/files/1/0437/6746/4085/files/innocent_smoothie_recipe_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/5025/3992/files/nasuroge.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_off00006993.bin
942db371883ec1b4f0aa1f35ac3382bb0d27d2c8f7e627d6617887716855383e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6993 5700 bytes
font_01_sfnt_off00007cc9.bin
ad7811fc59a699f835840471a7fc16dfdebe103f31985ef467523bc4f04fee02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC9 9816 bytes

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