Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04f721d595d6cc9…

MALICIOUS

PDF

52.8 KB Created: 2020-08-06 14:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33f0ddbfe7dd1c03dd37e0c97dc7074b SHA-1: 649f2d8ac28fb85ed592a1cca036e098619610c0 SHA-256: f04f721d595d6cc909157119c55a1df1c5d39dae3745e0cab0e826a66d453e84
152 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for delivering malware or phishing pages. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL and text suggesting a business plan lure. The presence of a link farm further supports the malicious intent.

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=game+lodge+business+plan+pdf
    • http://jumazanub.bjbarchitect.com/uploads/1/3/1/4/131453645/96c5a7af692.pdf
    • http://files.habitimprintz.com/uploads/1/3/2/7/132740423/mubekelota-wupuxo-dudobet.pdf
    • http://files.theorderlynest.com/uploads/1/3/0/7/130739596/mefapos.pdf
    • http://files.shepardguitar.com/uploads/1/3/1/3/131380511/feridibodu_luvidazamutadu_bixabepedavov.pdf
    • http://files.bestgenevieve.com/uploads/1/3/0/7/130739007/ripof_nirizaxaxalum_solosewazebi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/1206488860.pdf
    • https://cdn.shopify.com/s/files/1/0428/4517/5971/files/27021763901.pdf
    • https://cdn.shopify.com/s/files/1/0436/0480/3746/files/envision_math_grade_2_topic_1.pdf
    • https://cdn.shopify.com/s/files/1/0432/7764/8027/files/rusinulapitij.pdf
    • https://cdn.shopify.com/s/files/1/0437/5475/0106/files/mefakawoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6055/files/basic_electronics_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/3377/8597/files/36816163453.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4843/files/500_greatest_songs_of_all_time.pdf
    • https://cdn.shopify.com/s/files/1/0440/4533/6726/files/pepoxinemefojofekageviw.pdf
    • https://cdn.shopify.com/s/files/1/0436/9825/8088/files/wikagoxozakenukunazasov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kewosa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/98966280921.pdf
    • https://cdn.shopify.com/s/files/1/0430/6550/8002/files/witofemoz.pdf
    • https://cdn.shopify.com/s/files/1/0436/2141/7123/files/vafapipelobadixo.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_off00008215.bin
49ca9a7e1eaf625b08b66fccd0de1b021fcfdb1d8d8307d6e5ca9ef88b5a9d03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8215 5236 bytes
font_01_sfnt_off000093d5.bin
dcf1da3ad2221b384fd8405e6031182a455e4228ba5c9411e0aa18bfdf30eca1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93D5 10504 bytes
font_02_sfnt_off0000b779.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB779 4324 bytes

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