Malicious PDF — malware analysis report

Static analysis result for SHA-256 e278cc1b8c933573…

MALICIOUS

PDF

41.9 KB Created: 2020-08-10 05:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 148342cbbbdfd864d90ad0355d83a5d5 SHA-1: 436e9d5a220863df92a8fb34f6bd6263ea784389 SHA-256: e278cc1b8c933573ef44216d3fb731d8ce0420af6edc549c44c3b007c0097fb5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a redirector to a known malicious domain, indicating a phishing or scam attempt. The document body, though partially corrupted, suggests a lure related to 'booking statements'. The ML classifier strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL.

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/pify?keyword=buchungss%25C3%25A4tze+leicht+erkl%25C3%25A4rt+pdf
    • http://xesefuj.onthespotjackson.com/uploads/1/3/1/4/131454012/fifufilozimil.pdf
    • http://files.essentiallybalancedmassage.com/uploads/1/3/2/6/132682063/8602828.pdf
    • http://files.creativeprintables.org/uploads/1/3/0/7/130739263/2786867.pdf
    • https://cdn.shopify.com/s/files/1/0437/1437/9930/files/3d_max_basics.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/mac_11_9mm.pdf
    • https://cdn.shopify.com/s/files/1/0432/8279/2606/files/zorodezaserugutamapusi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/moxakefosokazuzaxoti.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/loxixure.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/pirodisojene.pdf
    • https://cdn.shopify.com/s/files/1/0434/5892/0605/files/netavojumegokele.pdf
    • https://cdn.shopify.com/s/files/1/0435/3120/6808/files/oblivion_sheet_music_piano.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/gawupogudajezowexigideb.pdf
    • https://cdn.shopify.com/s/files/1/0437/8374/9781/files/toguboron.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006152.bin
08e63fe176d8471efcb2805dc3ad9251dfd20851480d6fe8eeffb12f37c18ee3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6152 5608 bytes
font_01_sfnt_off00007477.bin
e8b3842d4b46eccb139ff8fa0f1dda5791d9aa9cbe1633dc60cb58cf13d52231
pdf-font-stream PDF embedded font (sfnt) at offset 0x7477 11120 bytes