Malicious PDF — malware analysis report

Static analysis result for SHA-256 80943ee449fb6db8…

MALICIOUS

PDF

41.9 KB Created: 2020-08-11 02:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08011224435f639028310599542f2c00 SHA-1: 55110d9068e2bc15c11cc8d8891a7b56d719a04e SHA-256: 80943ee449fb6db8194b24d7f4b0a52dc0019e02a784f23555105ccc1a3d0a1d
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.com). The document body, though partially corrupted, includes the same URL and mentions a book title, suggesting a lure to trick users into clicking the malicious 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.com/pify?keyword=awakening+by+kate+chopin+pdf
    • http://files.fingaldistrictno54.com/uploads/1/3/0/7/130776791/tagine.pdf
    • http://files.thelodgeatthelake.com/uploads/1/3/2/8/132814138/zugokivi.pdf
    • http://files.heightsafesolutions.com.au/uploads/1/3/0/8/130873781/d3db5f6501cea5.pdf
    • http://vodemu.floridaacademyleague.com/uploads/1/3/1/6/131606407/lafuvadoxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5973/0839/files/rowuvar.pdf
    • https://cdn.shopify.com/s/files/1/0438/3670/2870/files/popelu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3681/9104/files/446416640.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zutazalurofesavasa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5064/7202/files/ar._js_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8876/files/28259278173.pdf
    • https://cdn.shopify.com/s/files/1/0433/8686/3783/files/3867865774.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8003629611.pdf
    • https://cdn.shopify.com/s/files/1/0432/3160/8989/files/funny_writing_prompts.pdf
    • https://cdn.shopify.com/s/files/1/0427/6781/0726/files/jarepurukeduziwewitudu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7969/5517/files/water_supply_and_sanitary_engineering_by_rangwala.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000589c.bin
da79cace831e8ca3808943fcc5ddaab00c1b95223aacc3c4d2a842f4e62b879e
pdf-font-stream PDF embedded font (sfnt) at offset 0x589C 5284 bytes
font_01_sfnt_off00006aa3.bin
633db24044d5f1a78415784963948b438a25f85b5c930a89e47eacd9efada824
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA3 9980 bytes
font_02_sfnt_off00008cc6.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC6 4324 bytes