Malicious PDF — malware analysis report

Static analysis result for SHA-256 151255ddf444c51b…

MALICIOUS

PDF

48.7 KB Created: 2020-08-29 18:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85eee0a1af704183b1411bee81536640 SHA-1: fdbf430b520af6a3f48823af5bfaba73e134f96c SHA-256: 151255ddf444c51b341ec8460159d4b2d115b00d7d1b86289017d26d574b4072
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a 'liftmaster star 450 manual' and a URL that appears to be part of a link farm, suggesting a lure to trick users into clicking malicious links. The ML classifier also strongly indicated maliciousness.

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=liftmaster+star+450+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8156/3286/files/komaxevonozopodexonoraj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8317/7885/files/lemavamakuvonivadi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/alter_ego_plus_3_livre_du_professeur.pdf
    • https://cdn.shopify.com/s/files/1/0430/8264/5665/files/amenaza_de_parto_pretermino_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5175/files/thriller_books_online.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_00f7684f025d458892ec26ba5be7e7ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_85d4b6f958204b24b3f2a9278f2e0a7a.pdf
    • https://cdn.shopify.com/s/files/1/0436/2669/2771/files/water_pollution_introduction.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6295/files/ripexinolojavej.pdf
    • https://cdn.shopify.com/s/files/1/0447/4558/8887/files/zopaditexez.pdf
    • https://cdn.shopify.com/s/files/1/0432/6221/4304/files/salesforce_governor_limits_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/80640233392.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006687.bin
eb99e2ccc1e1b1511d89e44ed90b45d96124f03306f2ffb147520420bcf36037		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6687 5208 bytes
font_01_sfnt_off00007826.bin
0bf751b501267d2be59d6c8063b139e863d280e5779bcd33b63644c936a218ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7826 12992 bytes
font_02_sfnt_off0000a10d.bin
fbf35e4136f74a5555aab3a4d4d3218b2c5f281edcc8437547fa8f88aeee88d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA10D 16116 bytes

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