Malicious PDF — malware analysis report

Static analysis result for SHA-256 d227e9a4e88bbe5a…

MALICIOUS

PDF

68.0 KB Created: 2020-08-01 12:10:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da4254847892e83ae156299ace7e1fa8 SHA-1: 2799d9df2804525c8883e04883a6c8ee55f811e3 SHA-256: d227e9a4e88bbe5a38a29e8166689cced2d2724998e495753144152078ee3bf4
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'Galaxy note 8 manual' and the malicious redirector URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly indicates maliciousness, and the PDF structure is consistent with link farm abuse for traffic redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=galaxy+note+8+manual
    • http://files.southeasternclubcl.com/uploads/1/3/1/4/131453429/6a59377cbe6f7b.pdf
    • http://files.four-lakes-taskforce-mi.com/uploads/1/3/0/7/130775834/979f5252da8b784.pdf
    • http://files.augustatnba.com/uploads/1/3/0/7/130776265/5b20a7.pdf
    • http://files.athertonymca.org/uploads/1/3/0/7/130740458/zavawuxoxezudokatik.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/tixamukezirideneso.pdf
    • https://cdn.shopify.com/s/files/1/0431/2865/1938/files/59396108736.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5359/files/2693521.pdf
    • https://cdn.shopify.com/s/files/1/0429/1887/1207/files/tijasemuzege.pdf
    • https://cdn.shopify.com/s/files/1/0437/6294/2113/files/15139951280.pdf
    • https://cdn.shopify.com/s/files/1/0428/8266/2553/files/53750977135.pdf
    • https://cdn.shopify.com/s/files/1/0432/5877/3662/files/43773665830.pdf
    • https://cdn.shopify.com/s/files/1/0433/2450/6266/files/42349509132.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8456/files/dirafelotabutojonudowomej.pdf
    • https://cdn.shopify.com/s/files/1/0430/5502/2234/files/37824572046.pdf
    • https://cdn.shopify.com/s/files/1/0431/5699/6247/files/zoxanikabami.pdf
    • https://cdn.shopify.com/s/files/1/0434/8946/0376/files/56538422025.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off0000d7eb.bin
3db5330463e3213eca22d808f6b8e3606f2111ce4a820a848e7f6646d3f5f2e6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD7EB 18608 bytes
font_00_sfnt_off00007dd3.bin
0f218325ea8635d97e901c9f99e82acc0570805e47b53dba36dd6b4874d6a70c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD3 4512 bytes
font_01_sfnt_off00008dd7.bin
664215dd902399faeb6f0a7e118f4f6bd5a1ce28812c65973b61fd63809b60f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD7 4788 bytes
font_02_sfnt_off00009e10.bin
593a452f0795506ac97007ad32b21767cc543cb1bc716fd74108abb5279d52e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E10 6640 bytes
font_03_sfnt_off0000afae.bin
e4a080495c553491e60b92d08be8a6a37ae8f076f81d036f57075a463a1ec5a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFAE 12044 bytes
font_05_sfnt_off0000f38c.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF38C 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.