Malicious PDF — malware analysis report

Static analysis result for SHA-256 60098f0f8a40fadc…

MALICIOUS

PDF

40.9 KB Created: 2020-09-07 15:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a55591b4a8adeefefa2fa8d08c340571 SHA-1: d7c13851136164628dca210f5a13d4db0f2d60cd SHA-256: 60098f0f8a40fadc14860fbf423da988afe037b520893e958a243e262f346ede
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as an injury report. The ML classifier strongly indicated maliciousness, and the PDF was found to contain a large number of external links, suggesting a link farm or redirection attempt. No scripts were extracted, but the presence of a malicious redirector URL is a strong indicator of a phishing or redirection attack.

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.link/pify?keyword=injury+report+chargers+patriots In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/140efa_1e0ee5eca8134ff690b1a64ae89ccf28.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/225520_a1c6b98a506b4077bf7aa14a90ca7826.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/dd4472_38c9cec0c64b4c5a975c78a05bcda5d1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/735189_57977fcff5a447b39040d2e1a8ecb9e9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/8815/1458/files/gantt_chart_maker_software_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/kasewix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/erasmus_2020_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6857/1294/files/38536701186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1474/8322/files/aditya_music_telugu_video_songs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/julepefasometimulad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/38434486693.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BF 5276 bytes
SHA-256: 487aa4f691301bd428e788f3176a15b8aa49fe20b3a4a0773631d2bd0b59821e
font_01_sfnt_off000073c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73C0 10332 bytes
SHA-256: 65da7ab7be271e2eb853b70c0e02dd591068dfdc23e16b9c49dd09d9e7c7c074

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