Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0544832f81d524…

MALICIOUS

PDF

113.3 KB Created: 2020-08-03 09:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5612dc1007b7a99a7ef5493d011f80cd SHA-1: 462c1d0c412ceee37e0b97a4a62584f76dd83063 SHA-256: 6c0544832f81d524e2e30c4ce259e22c7d55e9efb7ed50e3120fb4c21ea75603
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, with one identified as a malicious redirector. The heuristic 'SE_MFA_LURE' suggests the document is designed to trick users into providing sensitive information, such as MFA codes. The presence of many external PDF links also indicates a link farm, likely to improve SEO for malicious content or to distribute payloads.

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/pify?keyword=whirlpool+gold+series+refrigerator+manual
    • http://files.spiffs.org/uploads/1/3/1/8/131856050/5333387.pdf
    • http://files.shamanicarawakpriestess.com/uploads/1/3/1/3/131380343/3839298.pdf
    • http://files.sexualintegrity247.com/uploads/1/3/1/4/131453950/teratusukipu.pdf
    • http://files.amandakloy.com/uploads/1/3/2/7/132741176/7334017.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/dedalolumosev.pdf
    • https://cdn.shopify.com/s/files/1/0428/6103/5686/files/35301920906.pdf
    • https://cdn.shopify.com/s/files/1/0427/9028/9574/files/92289756516.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8128296882.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/kulexuwijojud.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/suvatatunem.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5400/files/runebikomumovego.pdf
    • https://cdn.shopify.com/s/files/1/0432/0247/8242/files/dazumufoxamemoxamanezezur.pdf
    • https://cdn.shopify.com/s/files/1/0432/1122/7300/files/gitetelinozofimi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1610/8707/files/the_jaunt_stephen_king_full_text.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/20249879831.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000171a4.bin
c101cd923e698e6ef9a07cb3bda199a76f36fd51fb3b8813c07371e1b29de4ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x171A4 5468 bytes
font_01_sfnt_off00018425.bin
52b133a49d1067ed658cf706abfc1e172743ee43c01cd69616974511d0fe0fed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18425 15900 bytes

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