Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef46968f68809a0c…

MALICIOUS

PDF

41.3 KB Created: 2020-07-09 15:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 4fa027680dd2a245957066279ae763ef SHA-1: a044ef38e8df1484b10ea738ac9dea98dd1d6079 SHA-256: ef46968f68809a0cc7b87bc98350da18463ebc0cc4f182c9d69d8c40a34463ba
184 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious sites. The primary redirector URL is https://ttraff.com/wb?keyword=theory%20of%20cookery%20books%20pdf. This indicates a phishing or content-luring attack. No scripts were extracted, limiting the analysis of dynamic behaviors.

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.com/wb?keyword=theory%20of%20cookery%20books%20pdf In PDF document text
    • http://files.jmn-i.com/uploads/1/3/0/8/130814642/badegumun-vafadivo.pdfIn PDF document text
    • http://files.hkcofc.com/uploads/1/3/2/6/132683111/lobojevaresale_jojolurirukekof_nunaduwarutare_rulilik.pdfIn PDF document text
    • http://files.victoriagyors.com/uploads/1/3/2/7/132710687/mobulif.pdfIn PDF document text
    • http://files.grandprixdrivingschool.net/uploads/1/3/2/6/132695839/450e4.pdfIn PDF document text
    • http://files.parkhillbowlingclub.com/uploads/1/3/2/8/132815154/4047543.pdfIn PDF document text
    • http://files.lucindalyonsfineart.com/uploads/1/3/1/4/131408864/9917893.pdfIn PDF document text
    • http://files.myececlass-observe.com/uploads/1/3/0/7/130775654/1407538.pdfIn PDF document text
    • http://files.sophiagardiner.com/uploads/1/3/2/8/132814523/3d2c05e06f72b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://ratumiratox.files.wordpress.com/2020/07/22864761352.pdfIn PDF document text
    • https://luriwoge.files.wordpress.com/2020/06/30721850695.pdfIn PDF document text
    • https://kavuzolujor.files.wordpress.com/2020/06/26768403247.pdfIn PDF document text
    • https://xugarezat.files.wordpress.com/2020/07/61885650596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62222626122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75609531209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41841620016.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/1/0433/0687/7080/files/mokotutirajozejimus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5803 4808 bytes
SHA-256: 0e2afe81e01bb1cd6888931e17ed8d5f026e22140c9b63540d7c479c68a09f94
font_01_sfnt_off0000686a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x686A 10328 bytes
SHA-256: 3418b7f87a5e132209a04859e8909753d9d85962ce079efe60eae36af836586c
font_02_sfnt_off00008bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC4 3084 bytes
SHA-256: 9956fbb00d961e9bd4636face2239a1397268a754eb8bfb8c8aa38be6d318489