Malicious PDF — malware analysis report

Static analysis result for SHA-256 de1871d07c3e3def…

MALICIOUS

PDF

41.2 KB Created: 2020-08-31 21:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4c62c31ae7788a331d795069df499c1 SHA-1: 7b26f2997700c75ee06d6af1d5e6deed3835412e SHA-256: de1871d07c3e3defd52bb798f850b35d12f407e1fb298718c064468813f2e436
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high ML classifier score and the presence of numerous embedded links. One critical heuristic identified a redirector link pointing to 'ttraff.com', suggesting an attempt to obscure a malicious destination. Another heuristic noted a large PDF link farm, with many links pointing to Shopify domains, likely for SEO manipulation or to host further malicious content. The document body appears to be corrupted or heavily obfuscated, but the presence of the redirector URL and the link farm strongly indicate a malicious intent to lure users to harmful sites.

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.com/pify?keyword=s%25C3%25A1ch+effortless+english+full+pdf
    • https://cdn.shopify.com/s/files/1/0433/4593/6535/files/ozark_trail_wagon_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/7355/1001/files/rolovigolageg.pdf
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/23964681663.pdf
    • https://cdn.shopify.com/s/files/1/0437/8689/5512/files/validity_sensor_driver_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0429/2440/8988/files/5829506004.pdf
    • https://static.usrfiles.com/ugd/de60da_03648f4d65c740f899c35bcbb88ae47c.pdf
    • https://static.usrfiles.com/ugd/16a96a_117e61f722ae42eabad46affe8c7297c.pdf
    • https://static.usrfiles.com/ugd/a44510_d4a0e87d6d60421ab75050e05e411da9.pdf
    • https://cdn.shopify.com/s/files/1/0434/1386/4604/files/samsung_french_door_refrigerator_manual_defrost.pdf
    • https://cdn.shopify.com/s/files/1/0437/1893/4677/files/surface_area_of_a_triangular_prism_worksheet_grade_7.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/tumaxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/zadewamo.pdf
    • https://cdn.shopify.com/s/files/1/0465/3721/2063/files/bonfire_childish_gambino_download_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0434/0498/4483/files/zodadavewipisebomemejav.pdf
    • https://cdn.shopify.com/s/files/1/0432/5045/0600/files/39231752153.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_off00005f2e.bin
473c7ff08033bd3e343e060736781a5562223115afd41982a46bfdd9d157180c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2E 5544 bytes
font_01_sfnt_off00007206.bin
7664ca7029991f0446a0057514818b3cc5df9c206a342d7defdf9aaabdbbe705		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7206 10884 bytes

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