Malicious PDF — malware analysis report

Static analysis result for SHA-256 56b0868d1391be4c…

MALICIOUS

PDF

97.3 KB Created: 2020-10-23 13:21:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6a809d7651bcbfab516ad41a1af386ee SHA-1: 398a48457f03cb39acf7a2dcc389ea418f65bb18 SHA-256: 56b0868d1391be4c462a5af4f14a02a11a208bb072db53c3f0bc7de256ba78b1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a significant number of embedded external links, with at least one redirecting to a known malicious domain (ttraff.com). This suggests a link farm or SEO manipulation tactic, likely intended to lead users to malicious content or phishing sites. The ML classifier also strongly indicated maliciousness.

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/aws?keyword=barche+lamsel+prayer+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.thdl.org/http://www.thdl.org/TibetanIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b8032020-0ce7-458e-9822-a4f8af08f20c/pimajawur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d663a6a-1969-454b-8f7f-156e315aecb6/pixebefedopifujazuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b518d02-8d51-49f9-b341-6abbc60a46ae/76772341342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd96adb6-84d7-414a-b17e-17b1e6a62c3e/4790834590.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/250a1049-ab08-488e-b37d-c29909e7320f/metomisefamuluji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ab192fb-d567-4d62-834b-94a242d51d9b/kugenonejokiporisegotuxuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f020da08-184c-4f78-b8f3-456bfba945c1/88168434944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7773/3014/files/govapidijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4027/9205/files/susovowufodufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/1798/5958/files/advanced_excel_formula_with_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6647/3627/files/45917269912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4876/2529/files/satyanarayana_book_of_microbiology.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/48677607317.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/37037835112.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/62222822992.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/jirewi.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
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlTibetanIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b5ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5AD 4988 bytes
SHA-256: 8d7b66ded4d3a24559ca81c8952ebd4d9533104408d537885ba2aa489e765d72
font_01_sfnt_off0000c6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AB 73592 bytes
SHA-256: a5a8c0333717e60eb4623b56d18a6b534257ea2df74a0b2aa8f91d045bf15f0d
font_02_sfnt_off0001430b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1430B 12000 bytes
SHA-256: 1354aeb3e1e3f23dacc440f61b24d3e6dd7f63270468ae80ff901d03b8ada1b6
font_03_sfnt_off000167ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167FF 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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