Malicious PDF — malware analysis report

Static analysis result for SHA-256 282737fef2da94e1…

MALICIOUS

PDF

40.4 KB Created: 2020-08-21 07:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2eb0411ebd8cc74f116b71e590342870 SHA-1: 227432af68dade08808c9bb36890acff2eeb2b86 SHA-256: 282737fef2da94e1ce304d38949fcdd0b90b800fe1e3e9fe7355f2bdb99e0b21
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 Shopify domains hosting PDF files, suggesting a link farm. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=cloudera+anaconda+parcel'. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the structure and embedded URLs point towards a phishing or malware distribution attempt.

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=cloudera+anaconda+parcel In PDF document text
    • http://files.rosebayrotary.com/uploads/1/3/2/7/132740377/gizul-binofavis.pdfIn PDF document text
    • http://files.esandypowell.com/uploads/1/3/1/4/131407183/gakegofosemut.pdfIn PDF document text
    • http://rulefife.caitlin-cannon.com/uploads/1/3/0/8/130874368/735b392217b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6905/4886/files/advanced_excel_2020_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9799/5944/files/pan_card_application_form_2020_latest.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/honeywell_thermostat_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/52008585094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8737/1171/files/1589917219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0697/6422/files/24722536455.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8377/4614/files/55331513704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/42415103318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3247/6838/files/pesezoviduk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/3277/5589/files/kit_road_ranger_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1531/5351/files/xisimulisudo.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_off00006159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6159 4792 bytes
SHA-256: de982c39d9a8c0706c1961151c270cc80e16c8560b7f28c83b4ff01df5245303
font_01_sfnt_off000071ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71AB 10468 bytes
SHA-256: 5a4851ed0d2748e4405d70dfb70a48da1ab2f1d5ae6815ee441e0c34384cfd65

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