Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba022008c3de6258…

MALICIOUS

PDF

59.2 KB Created: 2020-08-10 22:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 954370098ee0b0255eeb59bdc418b240 SHA-1: c859e65c82e387d6c0b6e64a79a0c2f237d87262 SHA-256: ba022008c3de6258c4e0917fae1bbbad7eb41580d05c5d7849a4b9328a62a3f7
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as an admission circular, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The PDF_SEO_LINK_FARM heuristic further suggests a large number of outbound links, many hosted on Shopify, likely to obscure the malicious destination. The SE_DOWNLOAD_BUTTON heuristic indicates a call-to-action, reinforcing the lure. The primary malicious IOC is the redirector URL.

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.ru/pify?keyword=du+admission+circular+2020+20+pdf
    • http://files.destinyinthedetails.com/uploads/1/3/1/4/131437886/52ed19c5e738f.pdf
    • http://files.letrim.com/uploads/1/3/1/4/131437233/zepovifete.pdf
    • http://files.kintzmejiaballet.com/uploads/1/3/1/0/131070820/roriv_jolagijofoxu_jerekoburukaj_depamoridikav.pdf
    • http://files.firstresponsetacticalsystems.com/uploads/1/3/2/3/132302876/vitojenutege.pdf
    • https://cdn.shopify.com/s/files/1/0434/2035/2677/files/vanufefugelevilalonedaz.pdf
    • https://cdn.shopify.com/s/files/1/0438/8156/2280/files/66909624009.pdf
    • https://cdn.shopify.com/s/files/1/0437/8417/5773/files/adobe_reader_download_apkpure.pdf
    • https://cdn.shopify.com/s/files/1/0431/5414/5444/files/40584475521.pdf
    • https://cdn.shopify.com/s/files/1/0439/0499/1400/files/eco_apocalpticos_e_integrados.pdf
    • https://cdn.shopify.com/s/files/1/0431/2170/5124/files/the_o_ring_store.pdf
    • https://cdn.shopify.com/s/files/1/0432/9721/0532/files/sedetalak.pdf
    • https://cdn.shopify.com/s/files/1/0431/7249/5519/files/bosapafarafegax.pdf
    • https://cdn.shopify.com/s/files/1/0437/3748/1365/files/mipotukokosag.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/84565003701.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/boxaxijuvivavumi.pdf
    • https://cdn.shopify.com/s/files/1/0439/7082/2302/files/adjective_phrase.pdf
    • https://cdn.shopify.com/s/files/1/0437/4547/6762/files/tedazabiwekapaxadul.pdf
    • https://cdn.shopify.com/s/files/1/0432/6768/6556/files/oligopoly_game_theory.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/71887146781.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009053.bin
ab1b33e0a3a1867b72878010252fcfe5697f5b5874022b598e08733b737d2926		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9053 5260 bytes
font_01_sfnt_off0000a204.bin
6b45db046d5da1fb6ee538386258ea0a33a748f33b177fccbcf841e762c51875		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA204 15080 bytes
font_02_sfnt_off0000d0f6.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F6 4324 bytes

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