Malicious PDF — malware analysis report

Static analysis result for SHA-256 e415898e91f4aabd…

MALICIOUS

PDF

42.8 KB Created: 2020-08-22 09:39:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cea4dfaf1f0daa42d1ad4616490c5752 SHA-1: b54db8e84fc7f1aa8174a7f1a35cee9872d3f07d SHA-256: e415898e91f4aabd62c9aca07f526126650ed8f8c3f6c0db90ae230f2eabed1a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. The document body and embedded URLs suggest a lure related to 'annual report payment'. The presence of a link farm and the ML classifier's high confidence further support malicious intent. The primary IOC is the redirector URL, which likely leads to a malicious payload or phishing site.

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=annual+report+payment+florida
    • http://vezab.puffpuffpasssmoke.com/uploads/1/3/2/3/132302956/400acd.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/62000222108.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/novujedekekifolokadowil.pdf
    • https://cdn.shopify.com/s/files/1/0433/5196/5855/files/clinical_hematology_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/1955/8299/files/apparel_industry_in_sri_lanka.pdf
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/ssg_by_laws.pdf
    • https://cdn.shopify.com/s/files/1/0439/9408/7582/files/english_sentences_for_speaking.pdf
    • https://cdn.shopify.com/s/files/1/0433/2254/0185/files/sevulovolupimilodig.pdf
    • https://cdn.shopify.com/s/files/1/0439/8376/5662/files/32573560306.pdf
    • https://cdn.shopify.com/s/files/1/0454/6029/1742/files/amhara_region_map.pdf
    • https://cdn.shopify.com/s/files/1/0429/5376/9123/files/automatic_irrigation_system_using_arduino_uno.pdf
    • https://cdn.shopify.com/s/files/1/0429/8348/9687/files/ffxiv_matanga_lamp.pdf
    • https://cdn.shopify.com/s/files/1/0435/4483/8293/files/bdfl_full_form.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006979.bin
4ba838b52485e4bc3953897a7735455edcb3c326e2c30b8f72598d7ebbf16c29
pdf-font-stream PDF embedded font (sfnt) at offset 0x6979 5100 bytes
font_01_sfnt_off00007ac6.bin
c17f2b363b0290b112b142f821c03620bc230e67497ae3f7c7337c09fa5bc304
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC6 10532 bytes