Malicious PDF — malware analysis report

Static analysis result for SHA-256 85cc72415f434d06…

MALICIOUS

PDF

127.7 KB Created: 2020-08-07 23:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0730c81b3e5364809b8aab066e871fc9 SHA-1: 993bde3e47c84729bc2dbcbe4858c07e047c1383 SHA-256: 85cc72415f434d069f564f21b7ed7718b4c1bcedca978801d1b310d2605c67e2
150 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. Additionally, it contains a mass external PDF link farm, suggesting SEO manipulation. The embedded URL points to a redirector that includes a keyword, indicating a potential lure for users searching for specific content. No scripts were extracted, limiting the analysis of direct payload delivery.

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.cc/pify?keyword=ashoka+history+in+urdu+pdf
    • http://files.drfelixroom26.com/uploads/1/3/1/3/131380915/kakukinoraledesa.pdf
    • http://totezifi.vegancandycookbook.org/uploads/1/3/1/4/131407668/pebegajiwo_rusevojoli_xolejija_sasap.pdf
    • http://files.across-africa.com/uploads/1/3/0/8/130813448/kaxowizat.pdf
    • http://files.titletownnews.com/uploads/1/3/0/9/130969206/887632e28b2c5.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/jikoxajozexakuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/tukoviwezusepiluzop.pdf
    • https://cdn.shopify.com/s/files/1/0437/6539/9713/files/xudisuzobuxezoxanojefupu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2946/2165/files/solixavet.pdf
    • https://cdn.shopify.com/s/files/1/0428/6418/1404/files/49984441618.pdf
    • https://cdn.shopify.com/s/files/1/0429/3220/7782/files/how_to_form_imparfait.pdf
    • https://cdn.shopify.com/s/files/1/0435/4605/0728/files/tetajinuvowex.pdf
    • https://cdn.shopify.com/s/files/1/0437/0432/0154/files/king_of_the_hill_kisscartoon.pdf
    • https://cdn.shopify.com/s/files/1/0430/8602/0775/files/66520599465.pdf
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/64608254964.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/zirevakusixodepikesop.pdf
    • https://cdn.shopify.com/s/files/1/0428/2069/8268/files/45465650463.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_off0001af85.bin
8a08e10d17d04832d2c8063e5419c5fc976dc31174a99474cf230c101e1ffb3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF85 5252 bytes
font_01_sfnt_off0001c165.bin
a7955115961cbd125e08c6b3e98cd86b8b19221dddd37fd976bb1d2c5a71d22e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C165 15652 bytes

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