Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd19dbc1d668e57…

MALICIOUS

PDF

46.7 KB Created: 2020-08-03 12:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10936f0e24471c18bc6b6cb2fc91571b SHA-1: 88e0af7c7dc7dd1c9cbcf1bc79e65f5e2b2f4a89 SHA-256: ecd19dbc1d668e574df1ab1d1dc324efc815103dda32fa09c9f98867a9936377
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a deceptive lure, presenting itself as 'VMware interview questions and answers pdf free download' to entice users. It embeds numerous links, with the primary redirector pointing to 'https://ttraff.ru/pify?keyword=vmware+interview+questions+and+answers+pdf+free+download', which is flagged as malicious. The ML classifier strongly supports the malicious verdict, indicating a high likelihood of this PDF being used for malicious redirection or phishing.

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.ru/pify?keyword=vmware+interview+questions+and+answers+pdf+free+download
    • http://files.exclusivedancerecruitment.com/uploads/1/3/1/4/131436967/4351360.pdf
    • http://files.walnutcreekbulldawgs.org/uploads/1/3/1/3/131382590/f1c8f1e4.pdf
    • http://files.livingthelifeworldwide.com/uploads/1/3/1/3/131398547/satugusunokup_pabira.pdf
    • http://files.mathiasscarborough.com/uploads/1/3/1/1/131163976/8159735.pdf
    • http://files.greenfieldcommunitychoir.com/uploads/1/3/1/4/131437724/9663880.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8837/files/vitituzu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1639/6697/files/nirvana_about_a_girl_chords.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/ruzawadadumadum.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/wosikixevez.pdf
    • https://cdn.shopify.com/s/files/1/0429/9315/6259/files/padogunofekujevog.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/fexitumafefo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6897/1415/files/vanilla_wow_hunter_macros.pdf
    • https://cdn.shopify.com/s/files/1/0432/4763/2548/files/luvunavujamedam.pdf
    • https://cdn.shopify.com/s/files/1/0435/9861/0589/files/kejekulevidave.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9146/files/lufuzubizobudajujurigimis.pdf
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/44550482522.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mosagewenusuwaguxizekud.pdf
    • https://cdn.shopify.com/s/files/1/0431/0879/4530/files/navagafixa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/47406397492.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_off0000694c.bin
020feda2ac929f1914fb38edb213b7fb65af8e372336fe6b718decf78df31090		 pdf-font-stream PDF embedded font (sfnt) at offset 0x694C 5312 bytes
font_01_sfnt_off00007b54.bin
2413cde9451d128ad5f94a345a8e571a40ab294dc2992449a70497ac8e7492dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B54 10296 bytes
font_02_sfnt_off00009e7a.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E7A 4324 bytes

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