Malicious PDF — malware analysis report

Static analysis result for SHA-256 65a0a96afb06b9c4…

MALICIOUS

PDF

46.7 KB Created: 2020-08-10 08:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9d414beb8bc2fc24d8123ef3d966bbc SHA-1: ff94da539cf965d2092d58b526d37afc50e8d96b SHA-256: 65a0a96afb06b9c44b6082d7c4c4cba29fae54edf9a6c264702daf16da612c3b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. This suggests the document is designed to lure users to malicious sites, likely as part of a phishing or scam campaign.

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/pify?keyword=sonda+foley+procedimiento+pdf
    • http://files.ameliakatjohnson.com/uploads/1/3/1/6/131606146/fazasilirif-mexoj-veveza.pdf
    • http://files.raveyouth.org/uploads/1/3/0/7/130775427/73b30d75b.pdf
    • http://files.givehim5.com/uploads/1/3/1/4/131482975/terodewadinax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5137558887.pdf
    • https://cdn.shopify.com/s/files/1/0431/0397/7634/files/xiseked.pdf
    • https://cdn.shopify.com/s/files/1/0437/9190/9025/files/principles_of_corporate_finance_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/7242/9980/files/9673739053.pdf
    • https://cdn.shopify.com/s/files/1/0436/3495/0304/files/24107656772.pdf
    • https://cdn.shopify.com/s/files/1/0437/3279/5541/files/90669811313.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/brachial_plexus.pdf
    • https://cdn.shopify.com/s/files/1/0438/6488/3355/files/cinderella_2020_movie_script.pdf
    • https://cdn.shopify.com/s/files/1/0429/6677/8009/files/zixitevoxapizane.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6919/files/mojezikaturuwuri.pdf
    • https://cdn.shopify.com/s/files/1/0437/6359/7473/files/namaz_ka_tarika_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1401/1555/files/80024688547.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006903.bin
2d721b7d99f08befc4df9e628e7f7d407706636efc9156b8e9864884145549a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6903 5116 bytes
font_01_sfnt_off00007a59.bin
8ad63a086277f4a7374737ac58bc569443a226c86572e567fea0be043799ce57
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A59 11092 bytes
font_02_sfnt_off00009e8e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E8E 4324 bytes