Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e6040c03916c8d…

MALICIOUS

PDF

42.8 KB Created: 2020-08-29 19:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bafbc73cc84f3f84241587d6791ab67 SHA-1: 2c143735da368d10e9653bb4b7263841814302db SHA-256: 03e6040c03916c8d92ffd05a28d83659fd82368b657afb893e6fb13adca9f705
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to distribute content or lure users to malicious sites. The document body, though partially corrupted, contains the malicious URL, indicating its likely purpose is to drive traffic to that destination.

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/wix?keyword=2.5+c%25C3%25A1lculo+de+la+inversa+de+una+mat
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_6dd4ad6a5c9541858a7f45dee7796066.pdf
    • https://static.usrfiles.com/ugd/b8c837_8758fbd13a154e019d46c88081db4d8f.pdf
    • https://static.usrfiles.com/ugd/b8c837_512ea1efca3748809b0548294fbd1bd7.pdf
    • https://static.usrfiles.com/ugd/c5d40f_e9643fa412864628bd979bd8855973a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_042bcdc01125418b8b193e4ea30b423a.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/cheap_thrills_song_djpunjab.pdf
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/the_laburnum_top_extra_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/juzoderinaguj.pdf
    • https://static.usrfiles.com/ugd/b8c837_83df093e9ddf49b2bd5c8590211b8142.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a6276d66f8341b9a030b75f3b7c5ef1.pdf
    • https://static.usrfiles.com/ugd/b8c837_9be2234007124171a6aad0196ce47b7f.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_off000065c1.bin
bcc973a013f5aeb7e895f47028ca589384be10ed307117661d48b939c6ef87ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x65C1 5572 bytes
font_01_sfnt_off00007801.bin
c6d7595d5eef3776d738f23b783cdcdeb9e93a419d4fc9a96e9bec50ec1c451e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7801 11220 bytes