Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea804b592cbcec4b…

MALICIOUS

PDF

41.6 KB Created: 2020-08-23 14:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30ea9cec1585f4e86305d6a10a459eae SHA-1: 70fd8f64f4d0d88f1cc0dce7dd4c05d223e591b8 SHA-256: ea804b592cbcec4ba9cf5fd7679d56abb0d485f3a512d5758f684dcafc4acd39
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a phishing attempt disguised as a waste management report. The primary malicious URL is https://ttraff.cc/pify?keyword=waste+management+report+format. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, limiting the analysis of specific execution behaviors.

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.cc/pify?keyword=waste+management+report+format
    • http://files.kohlservice.com/uploads/1/3/1/3/131382595/0ff5e2bd04df6.pdf
    • http://files.stephaniebershyoga.com/uploads/1/3/1/3/131379371/1049198.pdf
    • http://files.monicasscarfs.com/uploads/1/3/2/8/132814050/rogodulemewe_zofatidibevu_vetabokovuruvi_zexemujimiw.pdf
    • http://files.kirschlaw.com/uploads/1/3/1/0/131070062/421213.pdf
    • http://webezowiz.mollymaccartney.com/uploads/1/3/1/8/131858419/718460.pdf
    • https://cdn.shopify.com/s/files/1/0440/0149/3142/files/kudifujisipi.pdf
    • https://cdn.shopify.com/s/files/1/0465/5366/1590/files/gld_fact_sheet_2018.pdf
    • https://cdn.shopify.com/s/files/1/0428/8842/9724/files/acrobat_reader_append.pdf
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/70139520206.pdf
    • https://cdn.shopify.com/s/files/1/0433/7706/6140/files/wefeb.pdf
    • https://cdn.shopify.com/s/files/1/0427/4972/2790/files/83295681105.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4870/files/38063179328.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/pilatikosofevafe.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/1604960643.pdf
    • https://cdn.shopify.com/s/files/1/0443/1986/7036/files/advanced_english_dictionary_free.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_off0000631d.bin
74b1deffb65752d529b927bea48621ea3b74974ea3e661e4535ab31d71b1a010
pdf-font-stream PDF embedded font (sfnt) at offset 0x631D 5200 bytes
font_01_sfnt_off000074c0.bin
e004771f8e5057bf5d0013d11139e920d8373cd9742df354f8bc7ebbc9feb8b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x74C0 10928 bytes