Malicious PDF — malware analysis report

Static analysis result for SHA-256 2413ef222495b65c…

MALICIOUS

PDF

53.5 KB Created: 2020-08-06 10:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14a1db0abc89c9fa17ca3d565eecf6f1 SHA-1: 2f854aeb2352e679777e5d539e746bfe53772ccf SHA-256: 2413ef222495b65ccf071b50ddb50160cce4a1cd9b8046f0a0d74e1b1413300c
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, but one critical link redirects to a known malicious domain (ttraff.ru). This suggests a link farm or SEO poisoning technique used to lure victims. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful 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.ru/pify?keyword=homelite+330+chainsaw+manual+pdf
    • http://files.mnhistoryalliance.org/uploads/1/3/1/4/131406348/67b3f3.pdf
    • http://files.stclaircountydems.com/uploads/1/3/1/1/131164431/lidisasaput-pidomaxajowabiw-lodagixunupewo.pdf
    • http://kawajaxo.andridgesoundhealing.com/uploads/1/3/1/4/131453247/3000665.pdf
    • http://gununani.carolinadalmasart.com/uploads/1/3/2/7/132710797/3113400.pdf
    • http://basuzifo.mrscolessupersciencesite.com/uploads/1/3/0/7/130739777/677054.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8617/files/myatt._net_yahoo_login.pdf
    • https://cdn.shopify.com/s/files/1/0440/8606/7352/files/kevinaju.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5611/files/69917290581.pdf
    • https://cdn.shopify.com/s/files/1/0435/4542/8127/files/windows_host_file_location_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2077/files/jixunitibofo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3405/7621/files/gameshark_codes_ps2.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9285/files/kiwuxurojew.pdf
    • https://cdn.shopify.com/s/files/1/0432/3839/1970/files/navolawuwerekafimin.pdf
    • https://cdn.shopify.com/s/files/1/0434/4099/6519/files/89266496112.pdf
    • https://cdn.shopify.com/s/files/1/0434/2982/2631/files/3425003.pdf
    • https://cdn.shopify.com/s/files/1/0429/1556/1638/files/72360005730.pdf
    • https://cdn.shopify.com/s/files/1/0437/1624/7703/files/22602982107.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9215/files/compilar_trinity_core_github.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_off0000849a.bin
5a44bd5635cfa16392451725ecfa01147976b6c4f11e248fea721d87dfe76976		 pdf-font-stream PDF embedded font (sfnt) at offset 0x849A 5540 bytes
font_01_sfnt_off0000975c.bin
dc8070c24fadbbc724cd51b325c7b658a29f9e33946850130ac0df48c6551a55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x975C 10316 bytes
font_02_sfnt_off0000baa0.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA0 4324 bytes

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