Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b3dab159c5e378…

MALICIOUS

PDF

54.1 KB Created: 2020-08-03 19:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6c5903871f7a293f978a10a19700679 SHA-1: ed425e72d916e3920e619a5476f0604748c67801 SHA-256: 64b3dab159c5e378c8fd404e40068259b5621416d70b6fce2e088b9669d014e3
162 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to malicious infrastructure, disguised as a download for exam papers. The presence of numerous external PDF links suggests an attempt to manipulate search engine results or distribute malicious content broadly. The ML classifier strongly indicated maliciousness, and the document body contains the primary malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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=aieee+2020+question+paper+with+solution+pdf+download+vidyalankar
    • http://files.parksideadventistchristian.co.nz/uploads/1/3/1/3/131384306/1f3a443f89b6ad9.pdf
    • http://files.gohsolutions.com/uploads/1/3/0/8/130813630/fomole_ritemewo.pdf
    • http://tesuvuli.gopalkhanal.com/uploads/1/3/1/4/131407818/pokivogig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3501/6863/files/85480564557.pdf
    • https://cdn.shopify.com/s/files/1/0437/2440/6938/files/roduwoximisifoduz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5398/1594/files/14172941184.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8298/files/gupezubomopu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/lemaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/5105/6285/files/46092769958.pdf
    • https://cdn.shopify.com/s/files/1/0432/3776/9383/files/14976681059.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zijuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/2004/9822/files/sumetasesoxodojinemik.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99231100330.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6917/files/r4_card_for_ds.pdf
    • https://cdn.shopify.com/s/files/1/0435/4008/6935/files/pobefulure.pdf
    • https://cdn.shopify.com/s/files/1/0431/6905/4886/files/widusorifajuvigumijemopof.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • 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_off0000613d.bin
ffeb89eaad713c9717385028f79c9757067aafb2c2382ea8cbab0e6efe35a425		 pdf-font-stream PDF embedded font (sfnt) at offset 0x613D 6744 bytes
font_01_sfnt_off00007225.bin
df0ef588055fb4651f6a2f830b68dc8e3145368c927af58bac4046536d4ba1d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7225 5836 bytes
font_02_sfnt_off00008615.bin
bd8d3c7f9e3662e6ed9b0a114cd04a10553b8e68449b92e109566fafa3cef913		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8615 2464 bytes
font_03_sfnt_off000090bb.bin
9fcf1827f5c4facd9199f1468c7027b2ef060dc33c4e1191001f88e6c7a058e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90BB 10288 bytes
font_04_sfnt_off0000b3f4.bin
76c03893711faee543228099e3564024ccf8ba461c16c9c30997de2507ed997a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3F4 16340 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.