Malicious PDF — malware analysis report

Static analysis result for SHA-256 c073f2335015fa2e…

MALICIOUS

PDF

45.7 KB Created: 2020-08-11 05:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f796d36dd4e10502b4ba06c5d5acfbb1 SHA-1: ba1c09c3bfdebb2368cb7dd103fe3c13d72157b1 SHA-256: c073f2335015fa2ecc529cd4e70be0d2ec61bd6ab4a0c88c9084f1b06f433ea9
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm. The primary malicious URL, 'https://ttraff.cc/pify?keyword=building+leadership+capacity+in+schools+pdf', is a known malicious redirector. The document body appears to be malformed or contains obfuscated text, but the presence of numerous links and the ML classifier's high confidence score strongly indicate malicious intent, likely for phishing or malware distribution.

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=building+leadership+capacity+in+schools+pdf
    • http://potizate.redshift-consulting.com/uploads/1/3/2/3/132302978/basuvaginuxugati.pdf
    • http://files.dianehutchingsphotography.com/uploads/1/3/1/3/131398193/juzorilolerug.pdf
    • http://fifuba.jymshd.org/uploads/1/3/2/8/132814930/47ac063.pdf
    • http://files.medfieldheightspto.com/uploads/1/3/1/0/131070190/joridesaz.pdf
    • http://files.pansqip.org/uploads/1/3/0/9/130969984/1811080.pdf
    • https://cdn.shopify.com/s/files/1/0432/4153/7696/files/tupudevodokumutodisokixa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/balluff_capacitive_sensor.pdf
    • https://cdn.shopify.com/s/files/1/0431/6610/5759/files/big_oak_tree.pdf
    • https://cdn.shopify.com/s/files/1/0430/9634/2695/files/dobuzego.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/viweragupesuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/9209/8726/files/prevention_of_greenhouse_effect.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8118/files/84476775156.pdf
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/51028652833.pdf
    • https://cdn.shopify.com/s/files/1/0437/1628/0475/files/minecraft_pe_0._12._0_servers_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/29399219365.pdf
    • https://cdn.shopify.com/s/files/1/0428/4517/5971/files/10831566800.pdf
    • https://cdn.shopify.com/s/files/1/0435/9458/0136/files/the_fundamentals_of_drawing_anatomy.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9531/files/2625162468.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_off00006601.bin
13fd4f57cbfc01de3959822aa76e428e5d007334d5d6009a3f14a9c44ad53bea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6601 5452 bytes
font_01_sfnt_off00007882.bin
d8f2cd3f1c3a87e7542c60e71c7bd4411ff51e0e24e17ac49e687b978e81c37c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7882 10208 bytes
font_02_sfnt_off00009b64.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B64 4324 bytes

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