Malicious PDF — malware analysis report

Static analysis result for SHA-256 09f84d04bcd7dcd5…

MALICIOUS

PDF

44.0 KB Created: 2020-09-01 14:39:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8656bc02f60e92077d32be600d075d9f SHA-1: a0dcbe15c50703b586674dfed1204d8fbb42f74a SHA-256: 09f84d04bcd7dcd549afb068535787db49ee90a409470123fcbdde380a651180
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a primary link to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a 'search trends report' and includes the malicious URL. The presence of many external PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content.

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/wix?keyword=search+trends+report
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4683/8176/files/reason_9_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0434/3142/8248/files/gundam_rise_from_the_ashes_dreamcast.pdf
    • https://cdn.shopify.com/s/files/1/0437/7988/3170/files/alphabet_in_arabic.pdf
    • https://cdn.shopify.com/s/files/1/0430/4538/8442/files/base_de_datos_en_excel_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20931566490.pdf
    • https://cdn.shopify.com/s/files/1/0440/9442/3192/files/71053714497.pdf
    • https://cdn.shopify.com/s/files/1/0434/6213/1878/files/soul_of_nadalia.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/8857429064.pdf
    • https://cdn.shopify.com/s/files/1/0457/6896/6300/files/bhutan_kalan_district_fatehabad_haryana_weather_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/munirixisinukapud.pdf
    • https://cdn.shopify.com/s/files/1/0439/7072/3998/files/kebogonenotuxekanunelej.pdf
    • https://cdn.shopify.com/s/files/1/0462/0674/6777/files/janamesope.pdf
    • https://static.usrfiles.com/ugd/1a94e8_d673b41d94284ed0bbddc19bf708036b.pdf
    • https://static.usrfiles.com/ugd/b8c837_de81def0044f4711a94fb8dd501c1da2.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_a5c58fb0db1a44f1ba882a7ca0abd328.pdf
    • https://static.usrfiles.com/ugd/221f3a_30e76f558cf842bd8ea8f6c5fbcbe09f.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_off00006dd8.bin
0e95bf6a7d7f2c186a0c34cd1ea02708cfcc2a22f30682a4d3de6497160b5a7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD8 5232 bytes
font_01_sfnt_off00007f98.bin
1bbf74286dc2734fa78c3bf298a31c8f1960590f3e00a59957d01b0a9f420dd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F98 10400 bytes