Malicious PDF — malware analysis report

Static analysis result for SHA-256 38a735fd8d79adc8…

MALICIOUS

PDF

48.0 KB Created: 2020-08-14 14:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2853f70d3e9d713d4888931e7035a4e8 SHA-1: 0f64ff54ec807a0be6ef3db3e54c42a83db93ae9 SHA-256: 38a735fd8d79adc8184ac3cef157300e1fe42f53cb833160c733998d1cfc09d0
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body also contains the same URL, suggesting an attempt to trick the user into downloading a game, which is likely a lure for malware. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=bubble+shooter+game++for+android+2.+3
    • http://files.icsc-companies.com/uploads/1/3/1/6/131636678/5828212.pdf
    • http://files.coratoloassociatesllc.com/uploads/1/3/2/8/132815385/wesurozuxegunid-woxupugo.pdf
    • http://files.churchdiva.shop/uploads/1/3/0/8/130874339/mixisenu.pdf
    • http://gujuw.kimballstjosephs.com/uploads/1/3/0/7/130775918/fatanupuwagakapi.pdf
    • http://files.madsincinema.com/uploads/1/3/1/4/131437750/lolisesinukigesukabo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5221/2130/files/alter_ego_plus_a1_vk.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/bekebuliwe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lafiku.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nudukesobiji.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/77339351830.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40948382406.pdf
    • https://cdn.shopify.com/s/files/1/0438/8257/8088/files/zisevuxudosi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6946/3959/files/pukasisibamogodonuzoxedes.pdf
    • https://cdn.shopify.com/s/files/1/0431/5496/4637/files/54515491812.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/gofajofokolexago.pdf
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/70354136764.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8951/files/led_zeppelin_houses_of_the_holy_tab_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/xoxosaludepo.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
stream_006_off000090bb.bin
2020a3ff45293136224a833b9b063c57fc16740b8d58d832c3f97af521ba0de2		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x90BB 20016 bytes
font_00_sfnt_off00005bee.bin
676be138f6ffc8e1f03a163b4115b42332de1f5df334c60c84996b27e672d023		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEE 5836 bytes
font_01_sfnt_off00006fa7.bin
a655b9f1d046e40d46fca9a4b9af3f532942acf69f9f71c668e170565d9b8f3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA7 9612 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.