Malicious PDF — malware analysis report

Static analysis result for SHA-256 1529302f6d82db72…

MALICIOUS

PDF

46.7 KB Created: 2020-08-01 10:30:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fcd2190a0f7b0f041cd1f9b55d33e94 SHA-1: d2076e95850cbf1eea04311f15fdc9aa3e1eb19f SHA-256: 1529302f6d82db727208d1d7bbc43d5b0d208226ba789e4d350c4f83dcc774a2
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Volleyball game information pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. 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.ru/wb?keyword=volleyball%20game%20information%20pdf
    • http://files.unityofpalmyra.org/uploads/1/3/0/7/130775827/0d2098eedc2.pdf
    • http://files.aucklandtravelmedicine.com/uploads/1/3/0/7/130740490/04d2273.pdf
    • http://files.lesweatheritt.com/uploads/1/3/0/7/130740316/wobemikunifoxaw.pdf
    • http://files.whitneylawrence.com/uploads/1/3/0/8/130814586/bc71d2a6944df.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3993/2064/files/25473937685.pdf
    • https://cdn.shopify.com/s/files/1/0434/0655/7347/files/radiation_detection_and_measurement_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31670740491.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/nosadenibif.pdf
    • https://cdn.shopify.com/s/files/1/0435/1823/0688/files/87955982598.pdf
    • https://cdn.shopify.com/s/files/1/0429/3646/7612/files/xumavosogobinujoxu.pdf
    • https://cdn.shopify.com/s/files/1/0438/6720/9893/files/69000507929.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/35850122598.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3090/files/3315940023.pdf
    • https://cdn.shopify.com/s/files/1/0433/5540/6494/files/28584771339.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/84896581428.pdf
    • https://cdn.shopify.com/s/files/1/0431/7013/6230/files/gexewixasoruniduroro.pdf
    • https://cdn.shopify.com/s/files/1/0428/7964/7903/files/tuzilize.pdf
    • https://cdn.shopify.com/s/files/1/0433/7978/5886/files/jufor.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_off00007506.bin
d495324a3a45230a519f4cd0f421c31f5e1d073cf7d0626213dc1d41dfea73c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7506 5392 bytes
font_01_sfnt_off00008751.bin
ca0ca2ad959e801332c330a18dcc2b45aa4781eb2cfe64ac577b55613289cfb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8751 11800 bytes

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