Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5e3fd440873d9ca…

MALICIOUS

PDF

57.6 KB Created: 2020-08-11 06:32:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46998c88f7852310213097287b3f0a49 SHA-1: 3abd64c82c56f51ab67db2b6a5664c207084acbd SHA-256: c5e3fd440873d9cab46d14f5e73a66c2e35c7b79964e39a2f9dd99141a908ac5
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=quantitative+aptitude+mixed+questions+pdf', is designed to redirect users to potentially harmful content. The document also exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify domains, likely for SEO manipulation or to host further malicious content. No scripts were extracted from this sample.

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=quantitative+aptitude+mixed+questions+pdf
    • http://files.debbiejackson.org/uploads/1/3/1/8/131857983/mejoki-nutikuzo-bopebev-zudazeporarib.pdf
    • http://files.magicappleparents.net/uploads/1/3/2/3/132303071/zefotiluxe-digazozuvod-gumijadizuzak-wesopurifog.pdf
    • http://pagulu.sunninghill.com.au/uploads/1/3/1/6/131607095/2583385.pdf
    • http://repemiz.mauipopwarner.com/uploads/1/3/2/6/132681579/lebifamababodixelak.pdf
    • https://cdn.shopify.com/s/files/1/0433/2116/3941/files/sorting_algorithms_java.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vakijuxek.pdf
    • https://cdn.shopify.com/s/files/1/0434/3175/5932/files/powazimajuxuxatawoxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/65585899054.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/wedawomuriwopevaxekis.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/statistical_rethinking_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/59265492448.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8516/files/sijoxoroliwavotepebelab.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/77639208294.pdf
    • https://cdn.shopify.com/s/files/1/0430/8742/9785/files/make_file_smaller_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/vepegebuxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/31577846228.pdf
    • https://cdn.shopify.com/s/files/1/0447/1944/0028/files/blackjack_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/viteg.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000796d.bin
af269efc6396016ee3d359ae7c1096961a5befd4078787fc69351d5975ff52f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x796D 5372 bytes
font_01_sfnt_off00008ba9.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA9 3720 bytes
font_02_sfnt_off0000970c.bin
6452e57af228f57ddd5db82196035a1a26f7b499457e3f4cae3e415e58696d18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x970C 15336 bytes
font_03_sfnt_off0000c632.bin
a676eee49bdb79f9ff643e995272275f9b7d75dfcb86f6099c835c3a5d047203		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC632 4976 bytes

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