Malicious PDF — malware analysis report

Static analysis result for SHA-256 6109eb770996be97…

MALICIOUS

PDF

57.7 KB Created: 2020-08-31 04:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6224d66e34dabd816164d10392c6ddcc SHA-1: 0f973098d16e42725bd2eafebfdd2daf3118d558 SHA-256: 6109eb770996be976b3153753843e5d2b520f1a668d75da1f6b7d9ce1865dfdb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one pointing to a known malicious redirector infrastructure at `https://ttraff.cc/wix?keyword=minecraft+cops+and+robbers+2`. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious content. The presence of a large number of external PDF links further indicates a link farm or SEO manipulation tactic.

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/wix?keyword=minecraft+cops+and+robbers+2
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/3049/4882/files/vejeti.pdf
    • https://cdn.shopify.com/s/files/1/0437/3990/6197/files/charlottes_web.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/61503499634.pdf
    • https://cdn.shopify.com/s/files/1/0438/2025/3344/files/bosquejos_para_predicar.pdf
    • https://cdn.shopify.com/s/files/1/0431/7514/9719/files/demewajiwepiwovivegojozan.pdf
    • https://cdn.shopify.com/s/files/1/0434/7982/6589/files/15819898466.pdf
    • https://cdn.shopify.com/s/files/1/0433/8106/3838/files/8088587872.pdf
    • https://cdn.shopify.com/s/files/1/0433/7562/4350/files/wilijirobalagani.pdf
    • https://cdn.shopify.com/s/files/1/0431/8583/2096/files/bekhayali_me_bhi_tera_ringtone_zedge.pdf
    • https://cdn.shopify.com/s/files/1/0464/6735/0680/files/amman_bakthi_padalgal_ing.pdf
    • https://cdn.shopify.com/s/files/1/0433/6402/4479/files/mokuko.pdf
    • https://cdn.shopify.com/s/files/1/0437/1028/3931/files/the_prince_of_los_cocuyos.pdf
    • https://cdn.shopify.com/s/files/1/0433/7405/1493/files/kimikakugafusok.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/qantas_airways_limited_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/6760/4128/files/5662136699.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000095bc.bin
f3ec098dcd962bb480f7accf1752a4106a70fa856c57ec00b60223d2e5d1736a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95BC 5180 bytes
font_01_sfnt_off0000a759.bin
f51186d7730949e7c30893f54ad6b4b9b1936c120cf2d606a6b7894419803b8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA759 10668 bytes
font_02_sfnt_off0000cbc6.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC6 4324 bytes

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