Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ab8640562e460ac…

MALICIOUS

PDF

38.8 KB Created: 2020-08-19 15:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d838283cd27943330765c39dedd4481 SHA-1: 9fe68798430a6ac69e503aaba3cc8885d52c1daf SHA-256: 7ab8640562e460acc88600fe2a1dbe1d2a9f893e2870ba1296fa5b2f6c6c9ffa
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body text, though partially corrupted, contains the phrase 'Endnote free for windows 8' and the malicious URL, suggesting a social engineering lure to trick users into clicking the link. The presence of a download button heuristic further supports this phishing attempt.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=endnote+free++for+windows+8
    • http://bikazebon.yeovilconcertband.com/uploads/1/3/1/6/131637814/vexaxa_jegozegerojat.pdf
    • https://cdn.shopify.com/s/files/1/0449/4124/6619/files/the_greatest_showman_songs_ming.pdf
    • https://cdn.shopify.com/s/files/1/0431/7233/1675/files/sri_rudram_namakam_chamakam_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4819/8556/files/cciso_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/x_ray_absorption_and_x_ray_emission_spectroscopy_theory_and_applications.pdf
    • https://cdn.shopify.com/s/files/1/0430/1357/0709/files/cultura_do_abacate_embrapa.pdf
    • https://cdn.shopify.com/s/files/1/0427/6997/3415/files/exercises_present_perfect_already_yet_ever_never.pdf
    • https://cdn.shopify.com/s/files/1/0440/2456/1829/files/zekaboziv.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/12917460424.pdf
    • https://cdn.shopify.com/s/files/1/0435/8209/5517/files/mario_run_apk.pdf
    • https://cdn.shopify.com/s/files/1/0435/4070/9527/files/62492943841.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/walisolovatusavoxano.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_off00005a44.bin
0d40b2432c64beec417532d4c58dc1196e41f11066be183788a7e45485447380		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A44 4904 bytes
font_01_sfnt_off00006b1d.bin
af31f05bd6c4954af3a960cd3bf8544f46b280daef903001b5be765bc54477bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1D 10528 bytes

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