Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f32f9470fe83265…

MALICIOUS

PDF

39.8 KB Created: 2020-08-05 01:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1cc0357b7197c6782e4afeff1bc9f7ed SHA-1: 7398b3c553afb46bf63a19a108584734f13a647c SHA-256: 5f32f9470fe8326562d437f463097b6df5990016602aeb206fc6f553b378fc77
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector URL (https://ttraff.com/pify?keyword=ccie+routing+and+switching+version+5.+1+pdf). This suggests a link farm or phishing attempt designed to lead users to malicious content. 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=ccie+routing+and+switching+version+5.+1+pdf
    • http://files.mosston.school.nz/uploads/1/3/2/8/132814942/d1ff6ac0721dd9.pdf
    • http://redovi.woolydogdown.com/uploads/1/3/1/4/131437508/wixepatabi.pdf
    • http://files.artsypartync.com/uploads/1/3/2/6/132695339/dd183.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6105/9482/files/42986921629.pdf
    • https://cdn.shopify.com/s/files/1/0433/7169/2188/files/larson_algebra_1.pdf
    • https://cdn.shopify.com/s/files/1/0432/5123/7022/files/degobitemebirek.pdf
    • https://cdn.shopify.com/s/files/1/0437/3220/5722/files/92818880038.pdf
    • https://cdn.shopify.com/s/files/1/0429/0281/4876/files/wovegemizigafimibimogo.pdf
    • https://cdn.shopify.com/s/files/1/0436/0355/8564/files/56875575591.pdf
    • https://cdn.shopify.com/s/files/1/0428/1974/7999/files/periodic_table_with_atomic_number_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/29551613728.pdf
    • https://cdn.shopify.com/s/files/1/0431/6174/7605/files/6934910943.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/49689920154.pdf
    • https://cdn.shopify.com/s/files/1/0434/5603/7016/files/68977667335.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/dilagonejusu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/zatizifaxitexifoza.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_off00005a83.bin
283f4849117b45bb41b847207b94ae897c590152dc8d3c2fd8fefd4129230d2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A83 5648 bytes
font_01_sfnt_off00006dd8.bin
f8f02281da7627e617bd8997456e72b2f1055a0ad0b889d17bc405758f7b656e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD8 10136 bytes