Malicious PDF — malware analysis report

Static analysis result for SHA-256 0792fadddb11fa93…

MALICIOUS

PDF

40.3 KB Created: 2020-08-31 11:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 350f67f080e5462b2a5b380edb556c5a SHA-1: f97eca29401518030bae70f2b06dfbc759c5c47a SHA-256: 0792fadddb11fa93deacac69fe2f8a37d4f04349073e9b07bb5e0db2ee125c4d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a URL that is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for MP3 downloads, suggesting a phishing or scam attempt. The presence of embedded URLs and the malicious redirector strongly indicate an attempt to lead the user to malicious 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.cc/wix?keyword=seccaden+kumlard%25C4%25B1+fon+m%25C3%25BCzi%25C4%259Fi+indir+mp3
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/xutoxasobo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rowogumidakedodovejizana.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/batunezuvabawiwoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/bosch_classixx_frost_free_fridge_freezer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/5815/1070/files/jifowijoxagete.pdf
    • https://cdn.shopify.com/s/files/1/0440/2901/8262/files/mekesexapo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4393/0791/files/88267271712.pdf
    • https://cdn.shopify.com/s/files/1/0436/9137/6794/files/sawepifewubepara.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/mesanesoxudisamuzalol.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/nelly_furtado_all_good_thing.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7779/files/nejakosofabarineka.pdf
    • https://cdn.shopify.com/s/files/1/0430/1013/0073/files/xosar.pdf
    • https://cdn.shopify.com/s/files/1/0438/2782/2749/files/pdf_to_jpg_converter_online_free_small_size.pdf
    • https://static.usrfiles.com/ugd/865d50_bdd16ce344294540b957236fbac01664.pdf
    • https://static.usrfiles.com/ugd/f46427_512d149af5004c4fb0871de57dc12292.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5ce2959be1140ceb0e46b680de0cc8e.pdf
    • https://static.usrfiles.com/ugd/493135_4ac378c0aa664f07ba7a7f2467e40992.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_off00004f10.bin
3a8f6ed99504320f04e613a0755b7b465b596664157e94e02724e7a0507691a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F10 5888 bytes
font_01_sfnt_off000062d4.bin
ae17919019305914c8c566e9f97aee14dd1c67a4004edc56b4973ffd1fe477b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D4 16116 bytes

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