Malicious PDF — malware analysis report

Static analysis result for SHA-256 19624864bae4a0a5…

MALICIOUS

PDF

37.9 KB Created: 2020-08-23 09:01:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07003fdb8cba74d9659946c16ff95700 SHA-1: ddb58468ab5121bb1dc6607eedd2553c3764b1ec SHA-256: 19624864bae4a0a5e71a945dbc3ec929657d5a7cbb6e82d3232998f50cda45ca
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=el+poder+de+la+kabbalah+pdf'. It also exhibits characteristics of a PDF link farm, with numerous external PDF links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URLs and the PDF structure suggest an attempt to redirect users to malicious content or download further payloads.

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.ru/pify?keyword=el+poder+de+la+kabbalah+pdf
    • http://files.godsairforce.com/uploads/1/3/0/7/130739780/dusixavijiri_mugek_murokotewelagat.pdf
    • http://vogemome.sagebrushpopwarner.com/uploads/1/3/1/3/131383775/8987975.pdf
    • http://pumofej.seaweedmoon.com/uploads/1/3/2/7/132712358/patibonotevi-bulegu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8813/3787/files/80143175068.pdf
    • https://cdn.shopify.com/s/files/1/0435/9726/7112/files/kejelis.pdf
    • https://cdn.shopify.com/s/files/1/0431/9045/2385/files/minecraft_chisel_and_bits_1._12_2.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lewajoranuputefikilos.pdf
    • https://cdn.shopify.com/s/files/1/0429/3859/7539/files/denatesulevudexijatudike.pdf
    • https://cdn.shopify.com/s/files/1/0432/8692/1376/files/printable_dice_template_with_numbers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gopag.pdf
    • https://cdn.shopify.com/s/files/1/0433/0360/0283/files/bokiwufel.pdf
    • https://cdn.shopify.com/s/files/1/0432/8492/2526/files/63106186404.pdf
    • https://cdn.shopify.com/s/files/1/0434/7379/7285/files/suboguvakulawapazuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/belutijotokemol.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_off0000543c.bin
f31341b302ffe711a284a0f3ecbfb1051c4a426feff2ace3d8ec1053bdea93c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x543C 5112 bytes
font_01_sfnt_off00006599.bin
b66d2545273a61e289e3cbea5b06f284ae818e0607069a3bace79da679c5e776
pdf-font-stream PDF embedded font (sfnt) at offset 0x6599 10968 bytes