Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dc4eab78cd82db5…

MALICIOUS

PDF

40.1 KB Created: 2020-08-15 14:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f45656a4c44325a48ecc4b85866cd89c SHA-1: 8e8d726f07005da4256582b57de6f99c89af23d7 SHA-256: 6dc4eab78cd82db5a3cf629f13b89aa0a1b936bc392b7ada6dfd6bf1aee508b7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF files, many hosted on Shopify. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or exploitation.

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/wb?keyword=nevus%20of%20ito%20pdf
    • http://files.learningaboutlife.net/uploads/1/3/1/3/131382406/gusotekafiv.pdf
    • http://pelananib.merakigreatdanes.com/uploads/1/3/0/9/130969972/duveze.pdf
    • http://files.transportes-salazar.com/uploads/1/3/1/3/131383318/ce0bb1887d.pdf
    • http://files.artwithmrssouth.com/uploads/1/3/0/7/130775197/fixesiv_tunonitoxop.pdf
    • http://files.fablegroundscoffee.com/uploads/1/3/1/4/131454090/320dd8dabd6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0448/1895/6448/files/reading_past_simple_regular_verbs.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6486/files/psychological_counselling_techniques_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3199/files/tuvaveli.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4434/files/mafusiwufe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51906755497.pdf
    • https://cdn.shopify.com/s/files/1/0437/5989/4689/files/napebanevo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/pitekorezuwafuvagavipe.pdf
    • https://cdn.shopify.com/s/files/1/0433/8758/4675/files/john_boyne_libros.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasodidupafulad.pdf
    • https://cdn.shopify.com/s/files/1/0430/4342/2359/files/44559457950.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/86495996836.pdf
    • https://cdn.shopify.com/s/files/1/0435/5411/1656/files/92475595256.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_off0000608b.bin
ae816d5202fa1af7ee10bf110ca691022d7ffb0f6661b6fbb4c8c537b1d2a583		 pdf-font-stream PDF embedded font (sfnt) at offset 0x608B 4724 bytes
font_01_sfnt_off000070c2.bin
9da1dbfde34abc1045fa36a59113c4c330527e8c28af6e2589fabe41418f8c59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C2 10244 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.