Malicious PDF — malware analysis report

Static analysis result for SHA-256 782e0faba0710c74…

MALICIOUS

PDF

42.5 KB Created: 2020-08-24 00:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ee99c71020e63ba91159bc0051054b6 SHA-1: 1e52076a91875ebae0acac51a73e088b276efc26 SHA-256: 782e0faba0710c746bb695eb48ac4a2d1844442edecf00d463b9f6562599c91d
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to benign Shopify URLs, but one critical link directs to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to trick users into clicking through to potentially harmful 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.ru/pify?keyword=answer+to+thank+you+for+gift
    • http://libaxu.bluemountainfarms.net/uploads/1/3/1/3/131398367/lumome.pdf
    • http://files.caffeamouri.com/uploads/1/3/0/7/130775953/3c023aa.pdf
    • http://tojom.b-wellnow.net/uploads/1/3/1/8/131856462/164086.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/9743/0941/files/jebokatuvuro.pdf
    • https://cdn.shopify.com/s/files/1/0428/2341/8019/files/9340516526.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/types_of_angiographic_guide_wire.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/95784189968.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/36709742795.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/web_page_to_online_converter_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/6686/0455/files/tinegave.pdf
    • https://cdn.shopify.com/s/files/1/0435/7586/9603/files/42434752360.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/5151179522.pdf
    • https://cdn.shopify.com/s/files/1/0432/7876/2140/files/logical_programming_questions_and_answers_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0437/8315/9957/files/4l60e_transmission_rebuild_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/godasepipubavexoxed.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/jadual_kadar_caruman_sip.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_off00006832.bin
818ab1417a0b0c0d604579f74f77a66b52589af9834aca1b236e9ba8e5d055f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6832 5244 bytes
font_01_sfnt_off00007a1a.bin
5109fa7fed27f924deb0c5037f40285a41017a76a96609e8371b23f166cdffbf
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1A 10288 bytes