Malicious PDF — malware analysis report

Static analysis result for SHA-256 21012550ede8ed29…

MALICIOUS

PDF

44.8 KB Created: 2020-08-21 14:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b73d15639ced7522a150aeae34ca38e3 SHA-1: aee2da32f799e7b1759e494a20e7125aa5005b4d SHA-256: 21012550ede8ed29067113afae728e936a1f2eec54c4450f45bb53d39e881d96
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is disguised as a school district calendar. This suggests a phishing or social engineering attempt to direct users to malicious infrastructure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=bordentown+regional+school+district+single+sheet+calendar
    • http://files.capetipseafood.com/uploads/1/3/2/3/132302814/6005004.pdf
    • http://files.cosmopolifrench.com/uploads/1/3/1/4/131437834/2002812.pdf
    • http://pegitadas.ahgu.net/uploads/1/3/1/4/131406427/bakug_woxakuledid_metivolumom_zafut.pdf
    • http://files.giuseppemanzillo.com/uploads/1/3/0/8/130874125/1950144.pdf
    • http://gupimat.indiracreative.com/uploads/1/3/0/8/130874330/zepibekanitulu_wexepilugawidot_gamukuvemej.pdf
    • https://cdn.shopify.com/s/files/1/0430/9306/5877/files/tukimuzovazinajeganorow.pdf
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/7660866143.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xoxolesusoziviro.pdf
    • https://cdn.shopify.com/s/files/1/0438/3889/8333/files/61641084236.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7110/files/jigolakifan.pdf
    • https://cdn.shopify.com/s/files/1/0431/2835/7030/files/sadio_mane_injury_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/8461/1733/files/90528924314.pdf
    • https://cdn.shopify.com/s/files/1/0435/0361/6165/files/classifying_quadrilaterals_venn_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/97211940189.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9544/files/bobcat_610_manual.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f1d.bin
8475bf8d5e8271d00054a57273cbcc74058c1db90ada8d3dc6d2f1772e8c122c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1D 5340 bytes
font_01_sfnt_off00008151.bin
380ea6e43dcc11131fbf50f70d36b35f085bd5b412e1046d4ef1a5df6e257b1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8151 10676 bytes

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