Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bce6325b75238e2…

MALICIOUS

PDF

51.0 KB Created: 2020-08-10 17:51:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fe63c22039c9a743e94cac9b80b0e20 SHA-1: b25c45e7a8c55421046942ea110f337cc8727de5 SHA-256: 0bce6325b75238e2f8f18172d049f21930c17b71ac8df54b766e4e85b7921d66
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though partially corrupted, includes the URL "https://ttraff.com/pify?keyword=past+tense+and+past+participle+exercises+pdf", suggesting a lure to trick users into clicking a malicious link. 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=past+tense+and+past+participle+exercises+pdf
    • http://files.islandgemcreations.com/uploads/1/3/1/3/131380564/fivakutefetasowaba.pdf
    • http://files.inhometherapeuticmassage.com/uploads/1/3/2/7/132712080/libofu-pusefur-didale-wizunajonode.pdf
    • http://files.reflexologytampabay.com/uploads/1/3/1/6/131636990/xumefesazudobo.pdf
    • http://files.magnaggia.com/uploads/1/3/1/3/131379923/bacd222.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13578549785.pdf
    • https://cdn.shopify.com/s/files/1/0435/5152/2977/files/14097273318.pdf
    • https://cdn.shopify.com/s/files/1/0431/9507/2674/files/dark_matters_heroes.pdf
    • https://cdn.shopify.com/s/files/1/0430/4325/8522/files/koxolejivafafuzixibakeda.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/faramerujinusopuko.pdf
    • https://cdn.shopify.com/s/files/1/0431/0794/2549/files/python_celery_documentation.pdf
    • https://cdn.shopify.com/s/files/1/0435/0086/3643/files/99872774462.pdf
    • https://cdn.shopify.com/s/files/1/0445/6205/5332/files/sales_strategy_business_plan.pdf
    • https://cdn.shopify.com/s/files/1/0433/5815/9006/files/22646854484.pdf
    • https://cdn.shopify.com/s/files/1/0435/4814/7867/files/edit_using_adobe_acrobat_reader.pdf
    • https://cdn.shopify.com/s/files/1/0436/2525/0974/files/rumanagadetesasita.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3303/files/xapunafelepibulamesum.pdf
    • https://cdn.shopify.com/s/files/1/0430/8828/1761/files/in_search_of_lost_time_file.pdf
    • https://cdn.shopify.com/s/files/1/0427/7587/1654/files/35763433832.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0986/files/buried_alive_avenged_sevenfold_tab.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066fa.bin
53ff94a4f2e6b6854ccbc51d1e91e8f9177149ab05d03b6ef0aa37f26362bf7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66FA 4896 bytes
font_01_sfnt_off000077a2.bin
0c36e3f4293d5d35beddb8d7e0b720101f97041c4bc048d8d5f816c90881ce86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A2 10060 bytes
font_02_sfnt_off00009a3e.bin
d7ca92a1697f50adce96a56d0641bc6e736e9e509ec11e87f323ba38646c0a2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A3E 16252 bytes
font_03_sfnt_off0000afb0.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFB0 4324 bytes

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