Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a579dea280e36b0…

MALICIOUS

PDF

45.9 KB Created: 2020-08-19 03:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a73e93b9a2e6876039895fd808395e9f SHA-1: 1d115443f1b5600f4f1cc4e677058ab16d84a776 SHA-256: 0a579dea280e36b00972ca74d93f2c2195382b7150e65dc2ca86235dffe0e5da
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains a URL pointing to the same malicious redirector. This suggests the primary purpose is to redirect users to malicious sites, likely for phishing or malware delivery.

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=deleted+text+messages+android
    • http://zalox.vertriebsautomat.com/uploads/1/3/0/8/130873791/a37fc36dfccc248.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/4159/4266/files/15223589650.pdf
    • https://cdn.shopify.com/s/files/1/0427/6404/2396/files/electric_fan_problems_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/lexopasivaxofuzuzalukipub.pdf
    • https://cdn.shopify.com/s/files/1/0441/4147/8040/files/tukofabapigonisulebuxi.pdf
    • https://cdn.shopify.com/s/files/1/0449/0297/3595/files/supuwavoko.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepikopu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8412/8151/files/32256212652.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/vulejidixuzufe.pdf
    • https://cdn.shopify.com/s/files/1/0429/6815/4278/files/minecraft_item_generator_1._14.pdf
    • https://cdn.shopify.com/s/files/1/0433/9289/3093/files/positive_buck_boost_converter.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_off00006915.bin
1f61fa0cf51cb0f89bb00b9b69eb009eedab463d8982ce138d38e0a1f6ef690c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6915 5000 bytes
font_01_sfnt_off000079fc.bin
82db38ec08dd8346bdd9026991e368bb5bc9a6bc8fe4b7b87fa64996d9538ca0
pdf-font-stream PDF embedded font (sfnt) at offset 0x79FC 10140 bytes
font_02_sfnt_off00009c54.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C54 4324 bytes