Malicious PDF — malware analysis report

Static analysis result for SHA-256 49952fde13cd1b82…

MALICIOUS

PDF

37.1 KB Created: 2020-09-08 09:06:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01edc1ea377674a33236aed342bafcb1 SHA-1: 06bbbccba3413fd7fccb30e87794997b0d736ab2 SHA-256: 49952fde13cd1b8240716cd89546c2401d75cf50438025a3e1928c8db7f72403
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, including a redirector to a malicious URL, suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, contains keywords related to templates and the creation tool 'wkhtmltopdf', indicating a lure to disguise the malicious intent. The ML classifier strongly supports the malicious verdict.

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.link/wix?keyword=tab+divider+template+indesign
    • https://static.usrfiles.com/ugd/bc4951_b9b0114498e8422cacd90aa048548b68.pdf
    • https://static.usrfiles.com/ugd/9d24cb_dff6294207994246aea1ce9955419567.pdf
    • https://static.usrfiles.com/ugd/95bb70_607bf509590845c7aab7c61058acf445.pdf
    • https://cdn.shopify.com/s/files/1/0438/4056/9494/files/android_studio_java_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0441/files/30289315174.pdf
    • https://cdn.shopify.com/s/files/1/0435/1927/9263/files/90587777484.pdf
    • https://cdn.shopify.com/s/files/1/0428/8705/3471/files/24972417515.pdf
    • https://cdn.shopify.com/s/files/1/0437/0546/7035/files/jisunifudixagos.pdf
    • https://cdn.shopify.com/s/files/1/0432/7312/6052/files/93106999156.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/test_1879eb6a-339e-4d45-a409-571cd94a4742.pdf?v=1594212285
    • https://cdn.shopify.com/s/files/1/0435/1387/2548/files/49257142721.pdf
    • https://cdn.shopify.com/s/files/1/0437/8260/2913/files/awg_wire_chart.pdf
    • https://cdn.shopify.com/s/files/1/0429/9823/5289/files/angklung_jogja_pikir_keri.pdf
    • https://cdn.shopify.com/s/files/1/0434/4414/2245/files/xepuranepaka.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7305/files/fare_action_plan.pdf
    • https://cdn.shopify.com/s/files/1/0463/0675/4717/files/star_wars_the_force_awakens_gorillav.pdf
    • https://cdn.shopify.com/s/files/1/0431/2091/8679/files/effective_communication_notes.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_off000051e1.bin
2f90b8c32ea58a35efb2d3a63a5c18038ee3a956bbea823c4931cd924a485fef
pdf-font-stream PDF embedded font (sfnt) at offset 0x51E1 5428 bytes
font_01_sfnt_off0000643f.bin
d6d6bd40e4fd0923593b9263d6a4ec0147799a291f7045f5b04e3d34cbaf7e4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x643F 10364 bytes