Malicious PDF — malware analysis report

Static analysis result for SHA-256 33b8265580abb274…

MALICIOUS

PDF

53.8 KB Created: 2020-07-11 06:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 03d7427ca80bc66a88aaa7b2726552f9 SHA-1: e1caaa293c183903efd6d5e18b268d9f4fef56e6 SHA-256: 33b8265580abb27498663dce7c6ecbd216d32aabb471e186212425c1140a8276
184 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The document body text, while containing seemingly innocuous content like 'Al quran juz 2 pdf', is likely a lure to disguise the malicious intent of directing users to potentially harmful websites. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector attack pattern.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=al+quran+juz+2+pdf In PDF document text
    • http://files.thecometzone.com/uploads/1/3/1/6/131637014/vozoluximasax.pdfIn PDF document text
    • http://files.cyberbreachplaybook.com/uploads/1/3/1/3/131383467/0f18f1.pdfIn PDF document text
    • http://files.riokeyclub.org/uploads/1/3/1/3/131380138/risofakiw.pdfIn PDF document text
    • http://files.sanmateolimos.com/uploads/1/3/1/3/131383553/612544a.pdfIn PDF document text
    • http://files.sidemocrats.com/uploads/1/3/0/7/130738758/tafotutozarera_pefonezibex_degijaguzavura.pdfIn PDF document text
    • http://files.capptivatebeacons.com.au/uploads/1/3/1/4/131483029/6869654.pdfIn PDF document text
    • http://files.oregonfestivalforworldrelief.com/uploads/1/3/1/3/131383673/donokomizun_nexaxo.pdfIn PDF document text
    • http://files.4marinhomes.com/uploads/1/3/0/7/130740045/kepuvamabekoziliv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kivolikosax.files.wordpress.com/2020/06/kakiguteduxefiwibunititi.pdfIn PDF document text
    • https://lezidonopo.files.wordpress.com/2020/07/8545016078.pdfIn PDF document text
    • https://mameloga.files.wordpress.com/2020/06/11275631290.pdfIn PDF document text
    • https://xokiwija.files.wordpress.com/2020/06/85301412191.pdfIn PDF document text
    • https://domunilide.files.wordpress.com/2020/06/memaxufawitebunasogexu.pdfIn PDF document text
    • https://padofaw.files.wordpress.com/2020/06/nojesedinepojidiwanufomuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/faramerujinusopuko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kosetomamevisired.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/61467195026.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0397/7634/files/lozodudofogofisofibowet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vawis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/4726512363.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009be6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9BE6 24712 bytes
SHA-256: 881fe9588f60734a5569cb18aa780c8cb2bdf706cf10f55d44d47c2a2d4a3bbb
font_00_sfnt_off0000608c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608C 4756 bytes
SHA-256: ccba0260e22a11a2598293a125be6a84b732f44e699975217159678968364c55
font_01_sfnt_off000070c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C1 14224 bytes
SHA-256: afaa44d9698b014b69636b388dcf8319721094c8e45eb16386576b23f14f8746