Malicious PDF — malware analysis report

Static analysis result for SHA-256 0940c828dd987875…

MALICIOUS

PDF

83.6 KB Created: 2020-08-23 04:00:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a70c9faa3d60c250987490efc5df77e7 SHA-1: f85f1e73c450085f92974ea9be80336e07e2bf22 SHA-256: 0940c828dd987875e3777fe7b0979dacf71014e55a0e36c654bceb51ff844647
202 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text and URLs consistent with an advance-fee scam, specifically mentioning a movie title and a link to a redirector. The presence of numerous links, including a malicious one, suggests an attempt to lead the user to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=chupke+chupke+2006+movie
    • http://jogagumek.skilledpaint.com/uploads/1/3/1/0/131070894/jidebuzizeva.pdf
    • http://files.pecosrifleclub.com/uploads/1/3/1/8/131871614/nobuxe_pogub_pinofen_zajekebana.pdf
    • http://files.wellingtonartgallery.com/uploads/1/3/0/9/130969572/6511158.pdf
    • http://files.artfulscents.com/uploads/1/3/1/4/131407233/2398173.pdf
    • http://files.jlremy.com/uploads/1/3/2/6/132695701/a461c4e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/56812368423.pdf
    • https://cdn.shopify.com/s/files/1/0433/9515/4070/files/xepefogamerakewe.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3144/files/gipirupaxefelogema.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/vagajepobokinevo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3550/9415/files/3782631237.pdf
    • https://cdn.shopify.com/s/files/1/0439/2520/9256/files/66838522080.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9430/files/naxukoxijolozexax.pdf
    • https://cdn.shopify.com/s/files/1/0462/1418/5114/files/soroganekoxubeziw.pdf
    • https://cdn.shopify.com/s/files/1/0440/9245/7112/files/golang_cheat_sheet.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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00011151.bin
4b954544489a7f355e937905565c9316e2298b38df9506fc5bad01abad407da6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11151 18996 bytes
font_00_sfnt_off0000cf88.bin
a2852ed6bccfa45ab6d2ca583baa451b9cc0721e77f61069b784efbd67e65df5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF88 5116 bytes
font_01_sfnt_off0000e0dd.bin
fddfde5e00583d751ee91213db50b4ddefc600f9d3b9d978be0036e231269fb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DD 1640 bytes
font_02_sfnt_off0000e91b.bin
943375dbb8b441d40b43ff5adac106edeaa6e2591763296231df7b7e41e13da2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE91B 11820 bytes
font_04_sfnt_off00012fd4.bin
99a016b11346ac24669e1c1dcb7e1edbe33a748b2f2df403ae43142d0932eaa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD4 4356 bytes

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