Malicious PDF — malware analysis report

Static analysis result for SHA-256 efce38fc3421d55d…

MALICIOUS

PDF

79.2 KB Created: 2020-07-09 23:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d69b11d8fa20b46492b7c4103c7a21d1 SHA-1: cd44b236b8672c680bf28587210131c97e25101e SHA-256: efce38fc3421d55d87bd57e5e31ff5340b9e598343a04f366aab6b6b07b213cf
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external PDF files, masquerading as an English Premier League fixture list. One of the embedded links, https://ttraff.com/wb?keyword=english%20premier%20league%202019/20%20fixture%20pdf, is identified as a malicious redirector. The document body and heuristics strongly indicate a social engineering lure to drive traffic to malicious infrastructure.

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.com/wb?keyword=english%20premier%20league%202019/20%20fixture%20pdf
    • http://files.doggievilleranch.com/uploads/1/3/1/4/131452778/kavamemomazevazumo.pdf
    • http://files.caseyharvilla.com/uploads/1/3/2/7/132712214/vevuzupakaki.pdf
    • http://files.markheggaircraft.com/uploads/1/3/1/3/131380998/13fbc841a385.pdf
    • http://files.heartlandjungians.org/uploads/1/3/0/7/130776841/ziniruper.pdf
    • http://files.kirstydallasauthor.com/uploads/1/3/0/8/130814387/ledusokuwuzuxut.pdf
    • http://files.sustainmizzou.org/uploads/1/3/1/6/131606003/werewibaxuzamik-pejononaroge.pdf
    • http://files.vk3sn.net/uploads/1/3/1/8/131871894/d40f274a4b81b4.pdf
    • http://files.bonneygirlphotography.com/uploads/1/3/2/6/132681204/sapoxorufewodod.pdf
    • http://files.levelsofminimalism.com/uploads/1/3/1/4/131454549/bizaworigoga-gepususumotum.pdf
    • https://kuvilagegap.files.wordpress.com/2020/06/86962439957.pdf
    • https://piwedun.files.wordpress.com/2020/07/41759920758.pdf
    • https://faxomabulev.files.wordpress.com/2020/06/19725944514.pdf
    • https://susikebe.files.wordpress.com/2020/07/purugomike.pdf
    • https://zabirile.files.wordpress.com/2020/07/medixodetojoforogajepi.pdf
    • https://netuwep.files.wordpress.com/2020/07/nefimobod.pdf
    • https://tupozubobusi.files.wordpress.com/2020/07/44700291972.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kividerinogofigizunewif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mokotutirajozejimus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40429789840.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74140302582.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54341666742.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://cdn.shopify.com/s/files/1/0433/0687/7080/files/mokotutirajozejimus

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eebb.bin
a3158a311fda511a350281c61b77119e64d367eb1776e3a1892dc9a20d041457		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBB 5772 bytes
font_01_sfnt_off0001023b.bin
e2aed963faa20a6f04d7216c0fcceaab99de62b4980ded9726f5bcc706591e5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1023B 14532 bytes

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