Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a011fac4de52dbf…

MALICIOUS

PDF

44.2 KB Created: 2020-08-14 10:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95802e3073a8999255eb7e5c61b06b00 SHA-1: 5f9e4c8c43fd7000e6fb1d32fca5668b2038bc39 SHA-256: 0a011fac4de52dbf2ab40d915765268c3ad430453aba7cf3a72186d46c3334d0
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, masquerading as a cheat sheet for Madden 19. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this behavior. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to direct the user to a malicious site, likely for further exploitation or phishing. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=madden+19+franchise+draft+cheat+sheet
    • http://sitaxevi.chenguatmit.com/uploads/1/3/0/7/130775350/2647423.pdf
    • http://files.ordubhchocolate.com/uploads/1/3/1/6/131636719/2c53dc8.pdf
    • http://files.khloenoelle.com/uploads/1/3/0/8/130874012/1792609.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9199/2480/files/4400717496.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/47026904153.pdf
    • https://cdn.shopify.com/s/files/1/0437/9443/2161/files/romigoja.pdf
    • https://cdn.shopify.com/s/files/1/0435/7111/8235/files/burda_magazine_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2784/0669/files/fobakemiwufopunidarexu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1792/7837/files/50570427823.pdf
    • https://cdn.shopify.com/s/files/1/0436/0034/7299/files/simple_application_letter_sample.pdf
    • https://cdn.shopify.com/s/files/1/0429/4436/4710/files/langman_s_medical_embryology_12th.pdf
    • https://cdn.shopify.com/s/files/1/0431/7695/1965/files/chemistry_molecular_approach.pdf
    • https://cdn.shopify.com/s/files/1/0438/1189/7504/files/vewopupojan.pdf
    • https://cdn.shopify.com/s/files/1/0439/5086/6590/files/novulomodivemi.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_off00006df2.bin
cdc19fb63d9d8e14914815572d402e81e601d4ed85c7a03ba0bdab1ea45f10f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF2 5288 bytes
font_01_sfnt_off00007fea.bin
2c85a97f4f125fddc736b49f193bfe7bd2b9a0727f860e603b947094117593e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEA 10508 bytes