Malicious PDF — malware analysis report

Static analysis result for SHA-256 49877d5360d80d39…

MALICIOUS

PDF

33.0 KB Created: 2020-08-13 23:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 896503df43f7d080b0fa4ca49101b66a SHA-1: daecd28db2a6cb9a2e278125a43fd5d15b679724 SHA-256: 49877d5360d80d3978a1cfab1488a28ddea7ad6c2e43c9c0ae36159c0c7dade2
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=sankara+mahadeva+song', which is likely used to redirect users to a malicious site. Another heuristic identified a large external PDF link farm, with 'https://cdn.shopify.com/s/files/1/0431/2586/6662/files/2540893008.pdf' being one of the initial URLs in this farm. The combination of these factors strongly suggests a phishing or malware distribution attempt.

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=sankara+mahadeva+song
    • http://files.3riversmuseum.com/uploads/1/3/0/7/130739449/5286122.pdf
    • http://files.gatewayreadingcouncil.org/uploads/1/3/2/6/132695408/namamepamasawug-rerobekasoxet-nemowu-xibumisixogofo.pdf
    • http://files.amandasamanthabrookessecrets.com/uploads/1/3/2/7/132740553/xusimuwolukowi_bipud_katelozobajen_nudeg.pdf
    • http://waxime.franklinknollspool.com/uploads/1/3/1/4/131407370/a241b2d9200.pdf
    • https://cdn.shopify.com/s/files/1/0431/2586/6662/files/2540893008.pdf
    • https://cdn.shopify.com/s/files/1/0432/9707/9460/files/24917782064.pdf
    • https://cdn.shopify.com/s/files/1/0431/7904/9121/files/binary_code_system.pdf
    • https://cdn.shopify.com/s/files/1/0443/6800/3228/files/sefubunufojudo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2186/0007/files/dayz_mod_launcher.pdf
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/vofopufuwakotetezagepud.pdf
    • https://cdn.shopify.com/s/files/1/0432/5454/6590/files/elliptic_curves_number_theory_and_cryptography_second_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/8209/5517/files/poe_tempest_shield.pdf
    • https://cdn.shopify.com/s/files/1/0429/1752/7715/files/rigogufibegodexu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5820/7643/files/pupovezu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6017/3717/files/58442171559.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_off000044fa.bin
8913ef301ec6e8f896e739e6a42379e39c0361bd72e9ee1295c002b2adecb19b
pdf-font-stream PDF embedded font (sfnt) at offset 0x44FA 5432 bytes
font_01_sfnt_off00005742.bin
cd43e1d7976b12af59f0e7aaafa55d04ef6c8d84884136e0eac0ed187cf2eaed
pdf-font-stream PDF embedded font (sfnt) at offset 0x5742 9444 bytes