Malicious PDF — malware analysis report

Static analysis result for SHA-256 e482e55c0977336b…

MALICIOUS

PDF

45.6 KB Created: 2020-08-19 02:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88d69b42683b3e1c2d982aee03719824 SHA-1: ba702f5e53f20f244d9ee1498aac397dc951949e SHA-256: e482e55c0977336b14112e0c2c1035dba43c769b6ded429cf40058743af7bc0b
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, directing users to 'https://ttraff.cc/pify?keyword=contrast+induced+nephropathy+prevention+guidelines'. It also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF links, suggesting a social engineering attempt to direct users to malicious content under the guise of medical guidelines.

Heuristics 3

  • 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.
  • 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=contrast+induced+nephropathy+prevention+guidelines
    • http://mezokoru.tmp-gmbh.net/uploads/1/3/1/4/131437079/268354.pdf
    • http://videxi.coastlifechiropractic.com/uploads/1/3/1/3/131398134/nozinewerolove.pdf
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/associao_mista_de_resistores_exercicios.pdf
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/53879699291.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/jefojisoko.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21659337375.pdf
    • https://cdn.shopify.com/s/files/1/0437/5959/9765/files/free_printable_math_worksheets_2_digit_multiplication.pdf
    • https://cdn.shopify.com/s/files/1/0428/5143/4652/files/8350526392.pdf
    • https://cdn.shopify.com/s/files/1/0429/9898/8949/files/fotateruf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9023/1974/files/cellulose_acetate_review.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/87628468526.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zekimopesafirizaxos.pdf
    • https://cdn.shopify.com/s/files/1/0438/3975/0294/files/xibik.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7811/files/apprendre_la_langue_francais_pour_dbutant.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/11786427220.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073f2.bin
8235bab66cae0c1b54b31ee8efb75daf43fbc71cf6d23d4b0c7f6b4753fa0c31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F2 5404 bytes
font_01_sfnt_off0000864e.bin
aae2e475b96bfa425e5019ddbf1088cc598b8a9e7e2653458226b9be253c01c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x864E 10196 bytes

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