Malicious PDF — malware analysis report

Static analysis result for SHA-256 95775e711d88cc3e…

MALICIOUS

PDF

64.9 KB Created: 2020-09-04 21:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: abf2526a0c0ce85751671a9c1d651161 SHA-1: e9eb30ca93b09aa52f19c2b04c8b8459413e37ea SHA-256: 95775e711d88cc3e489967e9a65c717000bf26b82d063e1bb141397a59750de3
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a malicious redirector link disguised as a download for a 'dark mode facebook android app'. This link points to ttraff.club, which is flagged as malicious infrastructure. The document also contains a large number of links to other PDFs, suggesting a link farm or SEO poisoning attempt. The presence of a password archive lure suggests the document is intended to bypass initial security checks by encrypting a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/wix?keyword=dark+mode+facebook+android+app In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/89c6ad_2df0a554590446368912cb111e00261a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8acad3_11fd412598c74ad69bf22443875752b2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/97aff7_868fd6b5a88a4d6eb00850e6bac48a22.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/87d215_ce6529d66f124ad9a1fc1722aabc8635.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ddb60a_bed4b68218194384b488e3ccfb6af2ee.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6991/4782/files/33100881717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2329/3864/files/tewusebosanozilidaba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5195/7923/files/dagokubomixufisokusudalux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5540/6494/files/rofepixamilavezazob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2373/5720/files/niwosobakisapoteja.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/145364_a225427c04d8486986c2497dd8fc3bce.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4c1554_71877dd2be5d48219c5dc089dc3f3cc3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_163e8874deb34935ad4f2c67a3d5db7d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cd79e3_895296acbfac46bcac26fdaca222e8f4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c0b427_c8229eb8be1e44c6a927f61e9903f725.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6d45f6_65a96d999bfa46858ec2f30bc28c56fe.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/10e3af_f430487db367439daadf85cc0b2cfa90.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF3C 5292 bytes
SHA-256: 7e4235d6caff5de51e57ef37ac69550ea530c27ae89216f5759d82b873209ed5
font_01_sfnt_off0000d133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD133 10976 bytes
SHA-256: 5797072043b1400d5f8dd7589d29a5cc9c6a5818489129957d681a6bc6143d10

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