Malicious PDF — malware analysis report

Static analysis result for SHA-256 74743f85769720e6…

MALICIOUS

PDF

49.0 KB Created: 2020-08-14 07:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fed343e2dd8792af77345f9fcf825918 SHA-1: 8ec153d9186df779c31bea90c8c4828e54af4e40 SHA-256: 74743f85769720e611f88d840cac3e1dde3165d8b6ac3b42b9e059e52ed0d88d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, disguised as a movie title, redirects to a known malicious infrastructure at 'ttraff.com'. The ML classifier also strongly indicated maliciousness. This suggests the document is designed to lead users to malicious sites, 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=wrong+turn+2+dead+end
    • http://files.sunorthopaedics.com/uploads/1/3/0/7/130740249/2602390.pdf
    • http://files.paintwithpizzazz.com/uploads/1/3/1/6/131606006/vakupipixit-wekubulemog.pdf
    • http://rukifa.womenofcountrymusic.com/uploads/1/3/1/3/131398591/kujulobozisadexadupe.pdf
    • http://files.onsecondthoughtmagazine.humanitiesnd.org/uploads/1/3/0/9/130969183/titives.pdf
    • http://muzaz.floridaselectsoftball.com/uploads/1/3/2/8/132814930/bisevisuxebu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/9030392928.pdf
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/34834156618.pdf
    • https://cdn.shopify.com/s/files/1/0437/5547/1002/files/wolijobiwufuzup.pdf
    • https://cdn.shopify.com/s/files/1/0433/8086/7235/files/10126479399.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/zufigunuwopipiba.pdf
    • https://cdn.shopify.com/s/files/1/0431/0709/0581/files/29476596709.pdf
    • https://cdn.shopify.com/s/files/1/0434/2982/2631/files/html_progress_bar.pdf
    • https://cdn.shopify.com/s/files/1/0432/3088/8094/files/26808962471.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/aleluia_cohen_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/amsco_apush_chapter_12.pdf
    • https://cdn.shopify.com/s/files/1/0431/2121/3591/files/najemozixetimemiwabir.pdf
    • https://cdn.shopify.com/s/files/1/0435/1010/4228/files/vibal.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_off00007f07.bin
2b9330c68ae16dad660eb37107492f82afde239eeb16f63f01a80408b98d9bd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F07 4928 bytes
font_01_sfnt_off00008fe4.bin
1baca55b3c24694b941f20f88b7e53b4882961b1e2c2aa923d8d6db737b969b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE4 11064 bytes

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