Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0040b147712602…

MALICIOUS

PDF

86.4 KB Created: 2020-09-02 10:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb954b00b9090e0d07889a8dd5819b7b SHA-1: 733b43efda709ed597a1d05d3bfafccd36e1a1ce SHA-256: 5e0040b147712602864d88d361aee2131a127a8eb0ab7109a60e8d4eff52ffde
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The ML classifier strongly indicates maliciousness, and the presence of embedded links suggests an attempt to direct users to malicious content.

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.me/pify?keyword=psychological+adjustment+theory+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/craig_marduk_tekken_7_guide.pdf
    • https://cdn.shopify.com/s/files/1/0436/0346/0259/files/depuzuxebutafo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/mibiw.pdf
    • https://static.usrfiles.com/ugd/1c8c1e_ccb915cc177942248103ab1a2e1c6bc8.pdf
    • https://static.usrfiles.com/ugd/1df9ea_bdfe7a0dcb5a45b587b387116a839216.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/sujabideluxewupujemesafa.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/atlas_of_amputations_and_limb_deficiencies_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/7555/9829/files/bujupefapap.pdf
    • https://cdn.shopify.com/s/files/1/0461/5186/0387/files/42128351311.pdf
    • https://cdn.shopify.com/s/files/1/0437/7447/6440/files/74368551299.pdf
    • https://cdn.shopify.com/s/files/1/0433/8001/5262/files/sunadukila.pdf
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/vusiganawive.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff56.bin
3186df2570138daa39d9db99a1d93f710bbc626b903452d2e59387585ee769b1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF56 5748 bytes
font_01_sfnt_off000112c9.bin
390d9a39e0853f6e0452a4c318277865566a2e4f40ab24a106cbedeba86747e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x112C9 10552 bytes
font_02_sfnt_off000136f7.bin
49436f94d5abf10ca6af8af9848174aab82dfe7bc58a5146411d238fd5c76648
pdf-font-stream PDF embedded font (sfnt) at offset 0x136F7 16148 bytes