Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0509985ee463b9a…

MALICIOUS

PDF

49.7 KB Created: 2020-08-26 12:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f43dc8dea18a038eabd64497248443a8 SHA-1: 152828b0cfcbf3ff1284a13667e1bc46cc57640b SHA-256: c0509985ee463b9a0ffcb962a48f1fabc9c8cb300891b4e244d585977cc25e8b
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though partially corrupted, includes the URL that triggered the redirector heuristic. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to malicious sites via these embedded links.

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=la+entrevista+en+las+organizaciones+pdf
    • http://files.midpacificowlrobotics.com/uploads/1/3/1/4/131437474/tadedijowuj.pdf
    • http://files.saltwatercowboyfishing.com/uploads/1/3/1/0/131070518/gewimam_kalujegobineta_ramanipin.pdf
    • http://files.devynayre.com/uploads/1/3/1/6/131636890/7026158.pdf
    • http://lijegaza.laurenceremacle.com/uploads/1/3/1/4/131437940/4616442.pdf
    • http://files.angloburmeselibrary.com/uploads/1/3/1/3/131380107/e876a.pdf
    • https://cdn.shopify.com/s/files/1/0437/7450/9213/files/78670114281.pdf
    • https://cdn.shopify.com/s/files/1/0435/1298/7802/files/12637298410.pdf
    • https://cdn.shopify.com/s/files/1/0433/3184/6296/files/sajas.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2154/files/57898335583.pdf
    • https://cdn.shopify.com/s/files/1/0434/0016/7589/files/wilton_fondant_roller_guide_rings.pdf
    • https://cdn.shopify.com/s/files/1/0432/3157/6231/files/barcode_generator_reader._apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/juxewidax.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/print_blank_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0438/7880/9755/files/supatomaxexipefiwe.pdf
    • https://cdn.shopify.com/s/files/1/0462/4642/8823/files/personal_traits_worksheet_employability_skills.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_off00007854.bin
565e99d64711d6a9d59e14760bea8d85aa0dcd6973454cc7c2ff7caa52474b5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7854 1604 bytes
font_01_sfnt_off00008076.bin
2820286377da3be9b719d082b7024e63c5861ae1ddbdda3429380c097fd33fe3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8076 5372 bytes
font_02_sfnt_off000092e2.bin
7baf31289a655d4aef028a1dc4a5c804e7830f7ebc728bc513bc710ff1e6a1b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92E2 11932 bytes

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