Malicious PDF — malware analysis report

Static analysis result for SHA-256 20aac7da2d150b0b…

MALICIOUS

PDF

39.7 KB Created: 2020-08-15 15:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afd0a76f9ae5874e6e895d86dcb9817e SHA-1: e2b711afdc0497b97b0339bcc231c92d5b2742d1 SHA-256: 20aac7da2d150b0b080713448f797dbcc8216c9553c7ffdc592921662b166d88
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting an SEO manipulation or link farm tactic. The primary malicious URL identified is ttraff.ru, which is used to redirect to a search query for 'manuale fiat bravo 2011'. While the document body is heavily obfuscated, the presence of numerous links, including one to a potentially malicious redirector, indicates a malicious intent to lure users to external sites.

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/wb?keyword=manuale%20fiat%20bravo%202011
    • http://files.texasyellowroseguesthouse.com/uploads/1/3/0/7/130776326/2182491.pdf
    • http://wexokeju.samniquekahalsey.com/uploads/1/3/1/3/131383791/782125.pdf
    • https://cdn.shopify.com/s/files/1/0433/2240/9125/files/bind_jump_throw.pdf
    • https://cdn.shopify.com/s/files/1/0428/3065/9750/files/teramixeloxemuvimesi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/albertsons_job_application.pdf
    • https://cdn.shopify.com/s/files/1/0438/6645/6224/files/38734020405.pdf
    • https://cdn.shopify.com/s/files/1/0428/5526/8519/files/white_orchard_gwent_cards.pdf
    • https://cdn.shopify.com/s/files/1/0434/2356/3925/files/tuzus.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6232/files/xigiwijilow.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/lenevanenunoxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/1714/2433/files/samupavosokinexowifowagez.pdf
    • https://cdn.shopify.com/s/files/1/0439/0731/7912/files/engine_damage_report_sample.pdf
    • https://cdn.shopify.com/s/files/1/0437/8332/3806/files/learn_arabic_words_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0440/2642/9605/files/elapsed_time_worksheet_for_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/revupufemux.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/47419197582.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_off00005d18.bin
7648bb5680a2e3d7dbd0bbae8d34ce92d5309d0fc9032e5b4f4d94b7f913f26c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D18 5112 bytes
font_01_sfnt_off00006e9f.bin
c857e85829cb1baa9cce7e3bd379ee0005e3bd78d3fb4e0f641eac9c6a4601c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9F 10752 bytes