Malicious PDF — malware analysis report

Static analysis result for SHA-256 363ab0f2c048b6d0…

MALICIOUS

PDF

45.0 KB Created: 2020-08-31 20:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ebde5ac88819c84d875bacf73ea3f7c SHA-1: 162249cad0b77250e284924eb26c207386d1a3d0 SHA-256: 363ab0f2c048b6d0ef14076fdb8d4e468567aae9e46c7d9d3ea3ee5730534fcc
152 Risk Score

Malware Insights

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

This PDF document contains a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains text related to 'Avast antivirus 2019 with crack', suggesting a lure to trick users into clicking the malicious link. The PDF also hosts a large number of external links, as indicated by PDF_SEO_LINK_FARM, likely for SEO poisoning or to distribute further malicious content.

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/wix?keyword=avast+antivirus+2019+with+crack
    • https://static.usrfiles.com/ugd/3ce946_8a69fd42faf24f4780b386a8a5d1338d.pdf
    • https://static.usrfiles.com/ugd/b8c837_20f2a63ed025432e8c3b46eb407c12ee.pdf
    • https://static.usrfiles.com/ugd/83f04e_4fd77a85f7334008af61631ecfd1409e.pdf
    • https://static.usrfiles.com/ugd/f14cf6_92ee4e6d216f4d0a9b13fea065bd6e56.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c89821c0d3b47179eb2d5a74a5db638.pdf
    • https://static.usrfiles.com/ugd/4725f1_af9069224935413abccb3cfaf68c3062.pdf
    • https://static.usrfiles.com/ugd/804ff6_effe0e9ce9d54351bd5c585e24078a7b.pdf
    • https://cdn.shopify.com/s/files/1/0447/7878/2869/files/50823889243.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/7423362781.pdf
    • https://cdn.shopify.com/s/files/1/0438/6357/2635/files/printable_bible_study_guide_for_genesis.pdf
    • https://cdn.shopify.com/s/files/1/0437/1179/1253/files/descubre_1_leccion_1_contextos_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/8900/2645/files/fur_elise_sheet_music_flute.pdf
    • https://cdn.shopify.com/s/files/1/0433/9662/8641/files/gogedakededuxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9292/6883/files/d_d_3._5_warlock_character_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28821374719.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_off000071e3.bin
b534449bcd2a47273de726dcd2e0dca28dfc9ea79e2234ae70d27e03bcf82559
pdf-font-stream PDF embedded font (sfnt) at offset 0x71E3 5544 bytes
font_01_sfnt_off000084cd.bin
845f46e1b4720025f19158b5da9f1bb2e4ce3db4fe0573060886bddfb0679ab9
pdf-font-stream PDF embedded font (sfnt) at offset 0x84CD 10192 bytes