Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eb7c5eb62ca6977…

MALICIOUS

PDF

42.8 KB Created: 2020-08-20 10:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f99b0952abac18f60b4ad4f06fd92c9b SHA-1: aed6d4177322cd355da980ce087a4313598e92a4 SHA-256: 7eb7c5eb62ca6977f3c2bc6f53c59a761c9289820d876eb4147f1e6454a25f7e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to manipulate search engine results. This suggests an attempt to drive traffic to malicious sites under the guise of providing information.

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.cc/pify?keyword=coca+cola+history+pdf
    • http://xipagew.physicstrialtestteam.com.au/uploads/1/3/1/4/131455158/fusubofavigipa.pdf
    • http://rabivugo.staugustinesmet.com/uploads/1/3/1/4/131407312/vikigixexi-razunukak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6617/0271/files/waweporigeluxojugomux.pdf
    • https://cdn.shopify.com/s/files/1/0438/5934/5573/files/ain_t_nobody_song.pdf
    • https://cdn.shopify.com/s/files/1/0429/2290/1663/files/fevixoxovevabitabafolag.pdf
    • https://cdn.shopify.com/s/files/1/0433/1402/0505/files/rawagimap.pdf
    • https://cdn.shopify.com/s/files/1/0440/8344/5925/files/cynthia_mejia-_giudici.pdf
    • https://cdn.shopify.com/s/files/1/0437/7496/7965/files/indesign_reduce_size.pdf
    • https://cdn.shopify.com/s/files/1/0435/5011/3943/files/cancer_de_mama_articulos_originales_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/6716/3302/files/bccdc_hepatitis_b_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/surorut.pdf
    • https://cdn.shopify.com/s/files/1/0441/4416/5016/files/7225657955.pdf
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/42417824923.pdf
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/59796925797.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_off0000699c.bin
afb4d7e9cf1a41df89a313605e0ceba467b1bb8681b387accc0712d4ef2f2880
pdf-font-stream PDF embedded font (sfnt) at offset 0x699C 5248 bytes
font_01_sfnt_off00007b68.bin
72fd462e373a46607d55e31e093f9ed9549bb8a880be0c07d74cf4e352b8bfcb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B68 10352 bytes