Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2089b8cb199b114…

MALICIOUS

PDF

43.9 KB Created: 2020-08-10 15:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d81a02d5b071f697018709c132277c42 SHA-1: 3e703a0a8b95c7c2b620b3060da6d72d593c1471 SHA-256: b2089b8cb199b114dae50e0a894c32b4771f22fc27812571dab7f8deb32c7872
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a technique often used to obscure malicious destinations. The primary malicious indicator is a link to 'ttraff.com', identified as a malicious redirector. This suggests the document's purpose is to lure users to a compromised or malicious site by presenting itself as a benign PDF. No scripts were extracted, limiting the analysis of direct payload execution.

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=difference+between+reducing+and+nonreducing+sugar+pdf
    • http://files.ritastreasures.net/uploads/1/3/2/6/132682787/jopopaxisujulaguzip.pdf
    • http://files.oregonbaton.org/uploads/1/3/0/9/130969532/wunumemefo.pdf
    • http://files.redlandsfcu.org/uploads/1/3/0/7/130739713/8fa17c330e54.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/basel_ii_pillars.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/12747430773.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75815848510.pdf
    • http://putaperij.dofuspourlesnoobs.com/uploads/1/3/1/8/131872225/3359341.pdf
    • https://cdn.shopify.com/s/files/1/0438/1478/1088/files/chapter_11_apush.pdf
    • https://cdn.shopify.com/s/files/1/0431/8494/7357/files/vekitizesululofewera.pdf
    • https://cdn.shopify.com/s/files/1/0434/5783/9254/files/3603107738.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7644/files/scert_up_books_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/1978/6645/files/21603823574.pdf
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/992374170.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/40431359436.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3031/files/90804501936.pdf
    • https://cdn.shopify.com/s/files/1/0436/8121/8710/files/dissolution_of_partnership_accounts.pdf
    • https://cdn.shopify.com/s/files/1/0437/3456/5025/files/60800248236.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_off0000600e.bin
bfbb3a943da917828b821be18d7cc9d110a9d4b8abbbc8bfaa0b16fd9d97ae23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x600E 5404 bytes
font_01_sfnt_off00007288.bin
d7b809e9c80494d67183a868a6d0b3fca94dcdd87cfd382da493d7e909fd9816		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7288 9840 bytes
font_02_sfnt_off00009432.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9432 4324 bytes

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