Malicious PDF — malware analysis report

Static analysis result for SHA-256 8518efdadc80709c…

MALICIOUS

PDF

75.8 KB Created: 2020-11-24 03:56:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d96355234ee10c17e94dfea3a4f798b SHA-1: 5f11067b16125b7fed49e5f9cbb4befe34b72b98 SHA-256: 8518efdadc80709cd2c886646e05a79d7d630050f3c5a65e96d8613bb3dec4aa
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying it as a malicious redirector. The primary malicious URL, 'https://traffmen.ru/123?utm_term=minecraft+pc+download+apk+2020', is designed to lead users to potentially harmful content, likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to software downloads, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/123?utm_term=minecraft+pc+download+apk+2020
    • https://cdn-cms.f-static.net/uploads/4376362/normal_5f91cc0e49ae6.pdf
    • https://saniruguroxi.weebly.com/uploads/1/3/4/5/134585545/4129051.pdf
    • https://cdn-cms.f-static.net/uploads/4418370/normal_5f9ceadf2f218.pdf
    • https://minufagotokuwak.weebly.com/uploads/1/3/4/4/134489045/4668882.pdf
    • https://nadosivilir.weebly.com/uploads/1/3/4/3/134316305/a7276e27997cd.pdf
    • https://wekijoborumotis.weebly.com/uploads/1/3/4/4/134484899/sazugi_mowimiju_viwabugoxe_jopep.pdf
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/d5735.pdf
    • https://jirixakevafu.weebly.com/uploads/1/3/4/4/134404576/kuxelodesojogerusipo.pdf
    • https://mogijoduvide.weebly.com/uploads/1/3/0/8/130814471/nibowozodi_raman_xuwebovojevokom.pdf
    • https://tajuweselu.weebly.com/uploads/1/3/4/3/134362517/tugoxukewudulib_wulejujokigoju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tinezedu/butterfly_digimon_piano.pdf
    • https://s3.amazonaws.com/zuxadol/fadugoxinilowatewuwineju.pdf
    • https://s3.amazonaws.com/zunaduxa/rutuwozezuwiz.pdf
    • https://s3.amazonaws.com/xamibudasagas/31833898681.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_off0000c939.bin
5224be6fd4eb273edcf00b8337981f7551c954ac45a5c6f5e2fe33f695bd78c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC939 5404 bytes
font_01_sfnt_off0000dbc8.bin
f7cea1b284c4c50a6d89af723d6aae2ae9d00cb0fc707a77ce7dcfa232fe26db		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC8 2544 bytes
font_02_sfnt_off0000e62d.bin
f021fb47e56d9760dc1d16a64cc57027cd498181e9772c0378a9f73c69e0f26e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE62D 10748 bytes
font_03_sfnt_off00010a70.bin
4332bf53b2772de9e757d581a598c745d27a663e25322a575c094526ec5f4c29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A70 17072 bytes

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