Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c49aadb66c69ca7…

MALICIOUS

PDF

37.5 KB Created: 2020-08-17 06:26:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aebcda066e9d75c168c4454b97714e97 SHA-1: fbb45513a4600af39d8cc7ebff2ca5c6979079e3 SHA-256: 5c49aadb66c69ca7fd860d4b84784f37ab97618eccc256372809d8f3894be393
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass of external links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests the primary goal is to redirect the user to malicious infrastructure, likely for further exploitation or phishing.

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/pify?keyword=ogden+ice+sheet+open+skate
    • http://files.proplayeracademy.com/uploads/1/3/0/7/130775387/3313089.pdf
    • http://xowovet.indianaclassics.org/uploads/1/3/1/4/131407424/6772506.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9558/9013/files/logo_quiz_answers_level_3_logo_33.pdf
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/workforcenow._adp_first_time_user.pdf
    • https://cdn.shopify.com/s/files/1/0433/5920/7582/files/22992453714.pdf
    • https://cdn.shopify.com/s/files/1/0430/1720/7971/files/rumelodisiwuxagalajuk.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/19479664381.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/36959847176.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/urticaria_multiforme_icd_10.pdf
    • https://cdn.shopify.com/s/files/1/0429/5032/8486/files/novezixapitekewi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1623/1840/files/concept_of_chromophore_and_auxochrome.pdf
    • https://cdn.shopify.com/s/files/1/0435/9408/8616/files/goxekutogoz.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_off0000537b.bin
361768fa5e2173db6b751e037dc7e4240413db0632d6e460ed6d5069dd45721d
pdf-font-stream PDF embedded font (sfnt) at offset 0x537B 5300 bytes
font_01_sfnt_off0000657e.bin
100964a49b82c8ad63e11df2ae261e97e5c9c0dae298b0b23fd4a63ed431698f
pdf-font-stream PDF embedded font (sfnt) at offset 0x657E 10588 bytes