Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bff464f90cafc1c…

MALICIOUS

PDF

48.0 KB Created: 2020-08-19 07:37:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94ea84414e78c205d48db2d5e537c6b7 SHA-1: 266dad9a01a4ba99ebda36ac08e739353081c28d SHA-256: 6bff464f90cafc1c1cc7972aedc7f4b3cfd03ef43279f207ef238cc057f6f5a0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a link farm designed to distribute malicious content. One critical heuristic identified a link to known malicious redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=broken+dawn+2+mod+apk+revdl`, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, also contains this URL, reinforcing its role as a lure.

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=broken+dawn+2+mod+apk+revdl
    • http://zatoxusor.nvcfa.org/uploads/1/3/1/3/131384714/zijixazu-butuf-fizosodajova.pdf
    • http://files.balancemassagebyann.com/uploads/1/3/1/0/131069890/rujifabibi.pdf
    • http://warar.aptdevelopmentgroupllc.org/uploads/1/3/1/3/131383629/nutufetupo.pdf
    • http://togowu.twinsmusicny.com/uploads/1/3/0/7/130775971/5855602.pdf
    • http://files.ccfnei.org/uploads/1/3/1/4/131437249/jibuxalemazekavi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/7537/1162/files/dimokuzirafakebuwifanil.pdf
    • https://cdn.shopify.com/s/files/1/0451/3798/5690/files/rotebaduzer.pdf
    • https://cdn.shopify.com/s/files/1/0436/1201/2701/files/fixubimowovubase.pdf
    • https://cdn.shopify.com/s/files/1/0434/6901/3144/files/73996304756.pdf
    • https://cdn.shopify.com/s/files/1/0435/6872/6171/files/nipeme.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niwaxesajikibulunetegidu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/doziximariluxerokuvinesa.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/44249284804.pdf
    • https://cdn.shopify.com/s/files/1/0430/2418/7549/files/jifijadadogurir.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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051a1.bin
b90b109c34db9b2d961be312c0c64f13ba4f5af9c83d6ae4556a72cb7f468167		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51A1 2880 bytes
font_01_sfnt_off00005bdf.bin
fb0fa0c4cff0aebfb4f185f903f51aab0f87816894088f1ba7564dea9d59cb9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDF 4984 bytes
font_02_sfnt_off00006ccb.bin
4d792698b87f2ce55c6c49dfcb3447fc5af2051cccb005d0d42b0508a9b4b984		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCB 10064 bytes
font_03_sfnt_off00008f7d.bin
17bd7bf39e4b4b4c887401f511e356fc9349c872ce5796f1d332a2d3103ac05c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F7D 16100 bytes
font_04_sfnt_off0000a457.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA457 4324 bytes

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