Malicious PDF — malware analysis report

Static analysis result for SHA-256 064d7fde9e44d749…

MALICIOUS

PDF

41.9 KB Created: 2020-08-31 16:01:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5118beba664462e6d4265158c7b9d43f SHA-1: 168566573b7a6eedcaffbde2519144fbbe852c2e SHA-256: 064d7fde9e44d74991286ba2d193d558e0b50d3e144cb292f53296e4a69b8f81
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=anke+calligraphic+fg+regular+font+free' which is flagged as malicious. This suggests the document is part of a link farm or phishing campaign designed to redirect users to malicious sites.

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=anke+calligraphic+fg+regular+font+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0242/7554/files/jodamu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/juwizeputetevu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/nedodizesu.pdf
    • https://cdn.shopify.com/s/files/1/0462/9174/6977/files/79683596232.pdf
    • https://cdn.shopify.com/s/files/1/0438/9991/2344/files/diablo_3_unhallowed_essence.pdf
    • https://cdn.shopify.com/s/files/1/0436/0703/1966/files/armstrong_air_ultra_v_tech_80_manual.pdf
    • https://static.usrfiles.com/ugd/b8c837_41401a2f0eea43b1b83d15ee84866c36.pdf
    • https://static.usrfiles.com/ugd/b4609a_288037bec8714e0db297e2047ef3307c.pdf
    • https://static.usrfiles.com/ugd/e2c250_c80d7de31f124f79b4c31bd7c1e15c03.pdf
    • https://static.usrfiles.com/ugd/de65f7_9491643474da4990a21c6e306641c00d.pdf
    • https://cdn.shopify.com/s/files/1/0434/7763/1126/files/64332142505.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/tamil_newspapers_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/9983/0952/files/baofeng_bf_888s_frequencies.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_off000057bb.bin
59b3307de1f5a2fa32475c2ae74409e82e4856a128f491fb0ca1d4c4b708defc
pdf-font-stream PDF embedded font (sfnt) at offset 0x57BB 5152 bytes
font_01_sfnt_off00006947.bin
17b032afe129d61c8779c3a9072075b0037d0873bfe629aa6bbeed5d4763428d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6947 15176 bytes