Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ce7513481f2019…

MALICIOUS

PDF

44.7 KB Created: 2020-08-29 21:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea2a94846d87c4f78a1b6a0fb276c02b SHA-1: f011f01714c489fda5f086a1d169b7c99a0ed7f2 SHA-256: 05ce7513481f2019fcaa4e9df81b9a2ebae184ec2cae018700aa36edb6d77c0b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, with a primary link directing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for an 'Australian sign language dictionary'. The presence of a link farm and a malicious redirector suggests an attempt to drive traffic to potentially harmful content, likely for phishing or malware distribution.

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/wix?keyword=australian+sign+language+dictionary
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_32bc560b756d44e78d1964fecf29cc72.pdf
    • https://static.usrfiles.com/ugd/b8c837_8aa41ffa18ba4e1197b953e9ff1370bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_73aa916ac39f44e487af74090e18aff9.pdf
    • https://static.usrfiles.com/ugd/b8c837_90469ef81c544b36abbc2934d9dec548.pdf
    • https://static.usrfiles.com/ugd/c7a620_76b235504a314584b783fa8783e216a5.pdf
    • https://static.usrfiles.com/ugd/0d2908_f3af4b3335e64733b46609e709f06ca0.pdf
    • https://static.usrfiles.com/ugd/b8c837_88e32447e3b6441d917e48ab411609f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_470c600901784a6480168fd239ba6a75.pdf
    • https://static.usrfiles.com/ugd/930050_3b762219cd224cfbab51a816bcb7a92d.pdf
    • https://cdn.shopify.com/s/files/1/0440/4353/4486/files/15972799981.pdf
    • https://cdn.shopify.com/s/files/1/0430/8818/3456/files/didatazilefokojisamidox.pdf
    • https://cdn.shopify.com/s/files/1/0436/9845/4693/files/70012105485.pdf
    • https://cdn.shopify.com/s/files/1/0435/7187/1912/files/fijizupa.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_off0000714f.bin
b8010a08af6f7e8a7cf3ce04c4ba9b516dacd30c38924f45ed45e8d97bf5e7a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x714F 5200 bytes
font_01_sfnt_off00008303.bin
53e328a033d6cffac0fc1cf8fa5338938ade34e2e76a389a3fd2a64bf1f8f1ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x8303 10356 bytes