Malicious PDF — malware analysis report

Static analysis result for SHA-256 0130acc6af28ad14…

MALICIOUS

PDF

43.9 KB Created: 2020-08-18 14:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76f4a4b2c3b7b861cd3b6dca8ab28d7b SHA-1: b2785240da561a4839cddbbf98f288a3dd4ea11f SHA-256: 0130acc6af28ad1499b13727f8002612d4634789c83a9e71481f84dd37b63b55
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for 'Catalina 10.15 dmg'. This link points to 'ttraff.ru', which is known malicious infrastructure. The document also features a link farm of 15 PDF files hosted on Shopify, likely for SEO poisoning or to host further payloads. The presence of a visual download button further supports the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=catalina+10.+15+dmg
    • http://fuvux.jar-labs.vomifix.com/uploads/1/3/1/4/131407815/rekodobosutiral.pdf
    • http://tuxum.growapes.com/uploads/1/3/0/7/130775997/46926.pdf
    • http://files.achievemediation.com/uploads/1/3/2/3/132302941/lifad_romoga_xalozaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/zobikovawewoxosovijamulur.pdf
    • https://cdn.shopify.com/s/files/1/0435/1705/1048/files/clicker_heroes_redeem_code.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/77363931764.pdf
    • https://cdn.shopify.com/s/files/1/0446/5659/1011/files/edit_mac_free_software.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/wapidorezi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8157/3279/files/patafurixunaxivodexek.pdf
    • https://cdn.shopify.com/s/files/1/0435/3160/0031/files/2984801135.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54440827626.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26384136461.pdf
    • https://cdn.shopify.com/s/files/1/0431/9464/6688/files/appearance_definition.pdf
    • https://cdn.shopify.com/s/files/1/0437/5651/9578/files/gumezusizedezuluj.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/pvc_flooring_sheet_specification.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000633b.bin
a1b1bd2b1669503a855124005acdbd7651390a4c422cadecf3420ae413024450		 pdf-font-stream PDF embedded font (sfnt) at offset 0x633B 4804 bytes
font_01_sfnt_off0000737d.bin
14a15f9ca6929cf362443ec5ec89a4717ae859e82d4598634ec7454e36a49d32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x737D 9740 bytes
font_02_sfnt_off000094da.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94DA 4324 bytes

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