Malicious PDF — malware analysis report

Static analysis result for SHA-256 70b3aea73aabb7ed…

MALICIOUS

PDF

98.6 KB Created: 2020-07-29 14:30:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5c8363ef7884d61d11e4195c4b68d21 SHA-1: c5d26313a2dff4515dac6920c22bc28fe5be39ef SHA-256: 70b3aea73aabb7ed81d13d2df63b4af379d96674c83be8e1e2dbd35b9038f4d1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, with one specifically identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a strong attempt to direct users to potentially harmful content. The ML classifier also flagged this PDF with high confidence, suggesting 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=importance+of+early+marriage+in+islam+pdf
    • http://files.figtreechristian.org/uploads/1/3/0/7/130776041/6ca019697e25e.pdf
    • http://files.northsoundtu.org/uploads/1/3/1/8/131858791/fatixuvizopoteki.pdf
    • http://files.galindasjewelry.com/uploads/1/3/1/4/131413040/9301055.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6391/8246/files/70702191010.pdf
    • https://cdn.shopify.com/s/files/1/0433/5868/3291/files/wewopebobijipugaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/1301/2641/files/81807602158.pdf
    • https://cdn.shopify.com/s/files/1/0438/3352/4386/files/36908637105.pdf
    • https://cdn.shopify.com/s/files/1/0432/2266/3325/files/10142283096.pdf
    • https://cdn.shopify.com/s/files/1/0434/2834/8056/files/fofenosekuleviluxewafe.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6835/files/wewetugubixugi.pdf
    • https://cdn.shopify.com/s/files/1/0436/3649/0398/files/xijezen.pdf
    • https://cdn.shopify.com/s/files/1/0432/7279/8373/files/mudepikupusamotip.pdf
    • https://cdn.shopify.com/s/files/1/0429/2250/8447/files/52078136396.pdf
    • https://cdn.shopify.com/s/files/1/0438/8388/8808/files/27439325960.pdf
    • https://cdn.shopify.com/s/files/1/0432/6617/9230/files/burapufafofafo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8475/9711/files/bojuxakuponap.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off00015381.bin
e1dca2987c6123b2daf53a8df849f991af0f332d8164b3e0c23100b64eb3345b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15381 22852 bytes
font_00_sfnt_off00010f59.bin
3b6a1826d2ae0ed0bc0b08206a7e7298defa88511ff13b37751d4fe62dff8c2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F59 5300 bytes
font_01_sfnt_off00012138.bin
0c1a23adc5084268ddfff3c5b7342530d0d74cf9661f34b16f749fdd7167752f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12138 4156 bytes
font_02_sfnt_off00012e82.bin
5707e070bf5ad6a57e2e6f835958d7853f5f6d22c72717271a5cdca99c9578d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E82 11240 bytes

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