Malicious PDF — malware analysis report

Static analysis result for SHA-256 1676c03c48ef7272…

MALICIOUS

PDF

41.2 KB Created: 2020-08-30 05:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ee7bd625617f80801c9c1db8d568dd0 SHA-1: 7d62eb5e3fa1891d0783554e761db87e27d51503 SHA-256: 1676c03c48ef72727a69eae4558e4ba6c94da5160e7c711697b4d3df7df6e94d
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, which is a common tactic for distributing malware. The document body and embedded links suggest a lure to download an application, likely malicious, related to removing Google accounts. The presence of multiple external PDF links indicates a link farm, often used for SEO poisoning to attract victims.

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=download+app+for+remove+google+account+odin3
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/9ff9b8_7b6b57c08b604f3bbe18aa12929372a5.pdf
    • https://static.usrfiles.com/ugd/b4a829_d71112e9a03f49e2824a60c9264c26ef.pdf
    • https://static.usrfiles.com/ugd/469aea_0cc7ef22bd7346c5b28d5dfd0a28557a.pdf
    • https://static.usrfiles.com/ugd/ad2ade_f0590490fdd04d2798a2ea9712bd8f50.pdf
    • https://static.usrfiles.com/ugd/b8c837_978537c9d2f54ed0ad751f165f3e0145.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/669297692.pdf
    • https://cdn.shopify.com/s/files/1/0460/9182/9412/files/tosatupininaxusinaj.pdf
    • https://cdn.shopify.com/s/files/1/0465/1240/6686/files/86497438835.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5400/files/kwela_kwela_sheet_music.pdf
    • https://static.usrfiles.com/ugd/b8c837_e26cb02dabca4e318de8f915af2fbb92.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3893e123da54d9893a167f3cf863578.pdf
    • https://static.usrfiles.com/ugd/d775a9_d87c9486579e4b908d674db825e064b2.pdf
    • https://static.usrfiles.com/ugd/87fdc7_f88af02a73de4bc9a0fe8f8d84c1ccff.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_off0000603a.bin
57a37428102127b799a7bed461d2cb53a24a3592a76b500a32ac3c3d11816822
pdf-font-stream PDF embedded font (sfnt) at offset 0x603A 5612 bytes
font_01_sfnt_off00007360.bin
84b6be5e5fe6c40ec75056b80d711eee39da609e4f301756e2cd6310b5e7ae96
pdf-font-stream PDF embedded font (sfnt) at offset 0x7360 10668 bytes