Malicious PDF — malware analysis report

Static analysis result for SHA-256 59147401f0ae23ff…

MALICIOUS

PDF

41.7 KB Created: 2020-08-09 03:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d83f3c82c0beeba81c62951307c94bdb SHA-1: 40e4849004845112cf5550ed9c059904ab66421d SHA-256: 59147401f0ae23fffc59d05e1f4d4dc48f6e9ce68d2799f1891a8d0288241b1b
152 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be malformed or obfuscated, but the presence of the malicious redirector URL suggests an attempt to lure users to malicious content, likely for phishing or malware distribution.

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=anesth%25C3%25A9sie+dentaire+pdf
    • http://files.silverfoxpottery.com/uploads/1/3/1/4/131407802/woburunukud.pdf
    • http://files.fccwareham.org/uploads/1/3/2/7/132740860/4414195.pdf
    • http://files.22ave.tv/uploads/1/3/1/8/131857120/doponej.pdf
    • https://cdn.shopify.com/s/files/1/0434/9883/2037/files/braula_coeca.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/biology_notes_form_4_chapter_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/12392631684.pdf
    • https://cdn.shopify.com/s/files/1/0428/0634/5895/files/92694211269.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3288/files/xurejipivi.pdf
    • https://cdn.shopify.com/s/files/1/0439/5529/0270/files/george_bohlander.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2426/files/dafosivug.pdf
    • https://cdn.shopify.com/s/files/1/0430/4030/9402/files/pubomanixofokoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/vesujajexatok.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5809/files/google_music_family_plan.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6149/files/minecraft_invisible_skin.pdf
    • https://cdn.shopify.com/s/files/1/0430/3493/5447/files/86011074667.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/xiretododisugelusu.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000630d.bin
c3aef192c2342a891c1abb4cc1ffb7bbb0226b072f94246755be2e85270a4efb
pdf-font-stream PDF embedded font (sfnt) at offset 0x630D 5228 bytes
font_01_sfnt_off00007488.bin
14addc34cbca122cc256c35c257eb4e767546ec0f7baa983ea99fb8f2bf9f47b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7488 11464 bytes