Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c35c8dd3a577884…

MALICIOUS

PDF

50.7 KB Created: 2020-08-15 04:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fad0dd2ffa44458dd2a5ae7e3403e8f3 SHA-1: 46387682aedf8e2fc139a8290d8b5094c755525e SHA-256: 0c35c8dd3a57788480e1eb2c8b3e8401c911f2293154dd78fcbecac0e68eeb3a
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 pointing to Shopify domains hosting other PDFs, forming a link farm. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=me+tera+amplifier+song++pagalworld'. This suggests the document is designed to drive traffic to malicious sites, likely for further exploitation or phishing.

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.ru/pify?keyword=me+tera+amplifier+song++pagalworld
    • http://dalaza.robertlaskey.com/uploads/1/3/1/4/131408567/1003365.pdf
    • http://kuxaguwo.shamrockbusinesscentre.com/uploads/1/3/1/6/131636719/watulalujawo.pdf
    • http://files.ashleykdrew.com/uploads/1/3/1/4/131437515/xekatemab.pdf
    • http://xewoviniv.nolafootdoctor.com/uploads/1/3/0/9/130969360/ab542.pdf
    • http://nijomixim.mscameron.org/uploads/1/3/1/4/131407406/gojun_vusikiguxusom_kekuvozukus_lulijutatagib.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/salamanders_codex.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/10228778109.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18491093394.pdf
    • https://cdn.shopify.com/s/files/1/0433/3050/2806/files/lirarume.pdf
    • https://cdn.shopify.com/s/files/1/0447/4172/2261/files/33958918469.pdf
    • https://cdn.shopify.com/s/files/1/0429/1464/4127/files/55332889239.pdf
    • https://cdn.shopify.com/s/files/1/0434/3712/9895/files/77814896516.pdf
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/kanep.pdf
    • https://cdn.shopify.com/s/files/1/0434/8405/3669/files/alfa_laval_separator_instruction_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/6925/0463/files/kaufland_letk_ostrava.pdf
    • https://cdn.shopify.com/s/files/1/0431/1305/4357/files/kodovuvopogoxute.pdf
    • https://cdn.shopify.com/s/files/1/0435/9585/8083/files/33494014450.pdf
    • https://cdn.shopify.com/s/files/1/0436/1555/1651/files/xorobipeteruf.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d45.bin
1809a5939304a7cfb3b08c9efb2f33a5138dedb6f41fccbb8e6832b69f8e53d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D45 5460 bytes
font_01_sfnt_off00006fcc.bin
a1c68180eae955d710b1f59d89b7b5bb1f22246194deffa7b9c3298859733f9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCC 2140 bytes
font_02_sfnt_off000079a4.bin
c16ac2a06547d043a3a9beff23c957f9a50b0c5b82000e37d5cf32d9dbd02882		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A4 10484 bytes
font_03_sfnt_off00009dc6.bin
001d00114279cda904ec87ee5caf81ece5266ef333c342f0ca5ce216f4908131		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DC6 18776 bytes

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