Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ddba61ad3d2c30b…

MALICIOUS

PDF

36.4 KB Created: 2020-08-23 10:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78e660120fc66faed7808e3cbc07a75d SHA-1: 7fe8ce81de6cfdcc1bb830b44887210f270beed3 SHA-256: 0ddba61ad3d2c30ba1e0f99a0d4848bd45986996c5ba4626f1c35617cb904268
154 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, masquerading as a catalogue, with one link pointing to known malicious redirector infrastructure. The ML classifier strongly indicated maliciousness. The document body and embedded artifacts do not contain executable scripts, but the presence of numerous links suggests a link farm or phishing attempt designed to redirect users to malicious sites.

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.cc/pify?keyword=bonfiglioli+gear+motor+catalogue+pdf
    • http://files.inspiredbyadele.com/uploads/1/3/0/8/130874554/daxesagezomusisatem.pdf
    • http://files.excellsafety.com/uploads/1/3/0/9/130969663/323501.pdf
    • http://tevemil.jmccarthyphoto.com/uploads/1/3/2/6/132683014/72fa85eec5a.pdf
    • http://files.trinityjoppa.org/uploads/1/3/1/4/131409498/1148706.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/6462/2246/files/age_of_empire_3_android_offline_apk.pdf
    • https://cdn.shopify.com/s/files/1/0432/5185/9616/files/43999220454.pdf
    • https://cdn.shopify.com/s/files/1/0432/5048/3368/files/kagesifegubugexoluvoba.pdf
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/zigugemibakija.pdf
    • https://cdn.shopify.com/s/files/1/0431/2485/0842/files/99297733931.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10542261424.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0583/files/renowolukiguwusapumivog.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000044b3.bin
361bcf419b174e795b43602e416cbc1c52f5d599ca65ce7f1efcad24b4a93b45
pdf-font-stream PDF embedded font (sfnt) at offset 0x44B3 5228 bytes
font_01_sfnt_off0000565f.bin
cd6e055a7bc28f5f714b23358ed41ec5fb5f5af37789a0f77ce2416d6ac55330
pdf-font-stream PDF embedded font (sfnt) at offset 0x565F 9536 bytes
font_02_sfnt_off000076fa.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x76FA 4324 bytes