Malicious PDF — malware analysis report

Static analysis result for SHA-256 278987d811b6c9dd…

MALICIOUS

PDF

44.5 KB Created: 2020-07-31 18:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7ecf3faf54387285b746a6582e4e9e8 SHA-1: 25931a3ec53eae5e78761e59adadc7818569ddf9 SHA-256: 278987d811b6c9dd56d855fffa82a5b6c80e8b1c17242344c229f3f9dbf3aef2
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically mentioning 'fedex freight bol' and pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm, with many links hosted on Shopify, suggesting an attempt to distribute malicious content or SEO spam. The ML classifier strongly flagged this PDF as malicious. The document body contains obfuscated text and the malicious URL, reinforcing the lure.

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=fedex+freight+bol
    • http://files.motivationalfoundation.com/uploads/1/3/1/3/131383434/ginevaredosu_pafupunew_ripikobuvi_liwesulaf.pdf
    • http://files.limemetro.com/uploads/1/3/0/7/130738720/pemobed_duvezabosinu_tutigafewun_kuvenig.pdf
    • http://files.archstorming.com/uploads/1/3/0/7/130775776/nodulozififopite.pdf
    • http://files.peakhealthcaremaryland.com/uploads/1/3/1/4/131406816/rizapisopasiraluzoga.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/wekotojixodizujipefil.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9213/files/95353733398.pdf
    • https://cdn.shopify.com/s/files/1/0429/6900/6236/files/56007341279.pdf
    • https://cdn.shopify.com/s/files/1/0434/3224/7457/files/83734441184.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0541/files/kofixikavimubi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/xegalumazojololoxifojor.pdf
    • https://cdn.shopify.com/s/files/1/0429/8588/1759/files/sosoneroj.pdf
    • https://cdn.shopify.com/s/files/1/0430/2022/2627/files/lodiwupibazobemasev.pdf
    • https://cdn.shopify.com/s/files/1/0432/7142/2102/files/17854706877.pdf
    • https://cdn.shopify.com/s/files/1/0436/0224/7838/files/piresevogoporigodufonux.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_off00006ff1.bin
de339b352381020d43344d5233c67691b2ce17b21bcee5608240099140a14672
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF1 4944 bytes
font_01_sfnt_off000080c7.bin
d5388e0b2cfae544e8fbbb6ef3874fd59759ffb7372ee0608148a2eca76796cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x80C7 10804 bytes