Malicious PDF — malware analysis report

Static analysis result for SHA-256 c18c7bbdfe2eab2c…

MALICIOUS

PDF

46.5 KB Created: 2020-10-15 13:14:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8049189333fc2ddb9a0d5732dc239f8e SHA-1: d467aec97c4c2c69de065ad3cddf3e747ba35639 SHA-256: c18c7bbdfe2eab2c8c49a821972d6e9033222f7d684e365bd5a39977bfc7e02b
184 Risk Score

Malware Insights

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

The PDF contains numerous links to external PDF files hosted on disposable domains, indicating a link farm designed to generate traffic or potentially lead to malicious content. One critical heuristic identified a link to known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious sites, likely as part of a phishing or SEO poisoning campaign.

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.club/pify?keyword=bajaj+allianz+life+insurance+company+profile+pdf In PDF document text
    • https://site-1040558.mozfiles.com/files/1040558/gogudovav.pdfIn PDF document text
    • https://site-1044019.mozfiles.com/files/1044019/gulemibofopunakuxedari.pdfIn PDF document text
    • https://site-1043447.mozfiles.com/files/1043447/mivawigoro.pdfIn PDF document text
    • https://site-1040391.mozfiles.com/files/1040391/excel_vba_sort_worksheet_data.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/kasodopizafazakoxuk.pdfIn PDF document text
    • https://vurofagulomefu.weebly.com/uploads/1/3/1/4/131452840/ramexebokoxajir.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/jinitorip-bolag.pdfIn PDF document text
    • https://taxajadotediru.weebly.com/uploads/1/3/0/8/130873824/wewaropawanad.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/c893a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/216c1a3c-132e-441f-988a-1d4da5c84b67/divexujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/796bef15-258e-4f55-9363-1ae4e8fe1722/kefijitajugizilejibaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acde9ae1-9fe6-4e16-aaa2-50c5b0b039b0/5352395286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87eea34f-333b-4204-8137-c24c08645d80/16647634162.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23e39710-13b3-419d-b0f7-8c7e13cdbf8d/wumupipotuxajejaxisek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7474/0636/files/59671723286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/9017/4886/files/kutemaniririlujudoxutub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1478/9541/files/47131660295.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2956/4062/files/afk_arena_peaks_of_time_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6485/2634/files/williamson_county_homestead_exemption_percentage.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7675 5580 bytes
SHA-256: ee9a0fa9e3219dbc61d53c5cdf9f4dfd07df39ac6fb7f3f80bad873ed40bbcc4
font_01_sfnt_off00008966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8966 10304 bytes
SHA-256: 25ad8f3479449dd4e00af163a2f3f00d8c2cfda7f65cd31c1a4919dc0e45f565