Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5e92fd9e1cdda59…

MALICIOUS

PDF

46.5 KB Created: 2020-07-31 14:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e4f9fee2a2fbf217fba0796f02bba5b SHA-1: e12759bab1874559ac8b1c32729d2782500059d0 SHA-256: e5e92fd9e1cdda59bef42eeb16da69d6dc5cf445416a78a09ed0f09efd09017d
152 Risk Score

Malware Insights

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

This PDF file contains a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic reveals a large number of external PDF links, many hosted on cdn.shopify.com, designed to lure users. The primary malicious URL identified is ttraff.com, which likely serves as a redirector to further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=adam+smith+theory+of+economic+growth+pdf
    • http://files.specialdayllc.com/uploads/1/3/2/6/132682882/7292586.pdf
    • http://files.jacksongop.org/uploads/1/3/0/8/130813701/4635501.pdf
    • http://files.silentscreamsandothermusings.com/uploads/1/3/1/4/131437037/pixazubenumejega.pdf
    • https://cdn.shopify.com/s/files/1/0432/4173/4311/files/mofozazox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sazofafusogowo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3021/6855/files/27462304811.pdf
    • https://cdn.shopify.com/s/files/1/0433/5665/1669/files/powasibefudedimawesijudu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8443/9971/files/78175504839.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/mipusodosawiju.pdf
    • https://cdn.shopify.com/s/files/1/0435/6826/7423/files/92569605452.pdf
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/28449616381.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/52314360114.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9115/files/makalu.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/
    • https://cdn.shopify.com/s/files/1/0429/8443/9971

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007943.bin
78b70ae6fb7cd1adf51df054c49935caf747a7af4f6c86787bbdd16f2a1ca65e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7943 5508 bytes
font_01_sfnt_off00008bee.bin
cee8b0d0777ad161d19cf3559e88d3154679e5da796e11dc5563d712207c81e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BEE 9724 bytes