Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f4fb272b857e688…

MALICIOUS

PDF

40.0 KB Created: 2020-08-17 05:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b0bdc61d00c3d5cdafb2208899a050b SHA-1: e1d01259016b1319a8c150f11e6e307a7d69dc46 SHA-256: 6f4fb272b857e6887b090bc07fc9ab1a8f30f73a31a2de5b6ae13012d1733c5c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a deceptive title and embeds a URL that is flagged as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document body, though partially corrupted, contains the malicious URL, suggesting a phishing or redirection attempt to external content.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=boss+new+song+ringtone
    • http://files.thescribblersjournal.com/uploads/1/3/2/6/132695200/xoduzigujizigunugivi.pdf
    • http://dokenizi.brooklynbbfl.com/uploads/1/3/1/6/131606552/1580149.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0599/3375/files/tevexab.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/silegifenopulewubofevub.pdf
    • https://cdn.shopify.com/s/files/1/0438/1350/3133/files/20470912583.pdf
    • https://cdn.shopify.com/s/files/1/0432/8810/1030/files/time_value_of_money.pdf
    • https://cdn.shopify.com/s/files/1/0434/1619/1125/files/xugiron.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74832969368.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2441/files/zinio_reader_4.pdf
    • https://cdn.shopify.com/s/files/1/0437/7165/8389/files/80146046200.pdf
    • https://cdn.shopify.com/s/files/1/0434/1114/4861/files/tabeluromipatovodenukew.pdf
    • https://cdn.shopify.com/s/files/1/0438/8965/5960/files/92525236491.pdf
    • https://cdn.shopify.com/s/files/1/0436/6453/9798/files/18164642421.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060c9.bin
da3e0a56bbe68a877257593f6560233edac1f533762184352107e63a5a97b9e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x60C9 4752 bytes
font_01_sfnt_off0000711c.bin
fe21436fb53655bf01f10eee47793b1ffcf7733a14bd37e78b602a16452d5729
pdf-font-stream PDF embedded font (sfnt) at offset 0x711C 10032 bytes