Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eef21765ba84fa7…

MALICIOUS

PDF

33.0 KB Created: 2020-09-19 03:11:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 110168df1eaa957ef92f570378f7d285 SHA-1: 5a12c9f0e18cfe90fdd04e20e9bd24657e074095 SHA-256: 3eef21765ba84fa7f7fd206d8fa1043c0e9ec0a70f1b257ae901a7c15a334adc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a malicious redirector, which is a common technique for delivering malware or phishing pages. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/wix?keyword=face+lite+apkpure', suggesting a lure related to 'Face lite apkpure'. The PDF also hosts a large number of other PDF files on Shopify, likely for SEO poisoning to increase visibility.

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.link/wix?keyword=face+lite+apkpure
    • https://cdn.shopify.com/s/files/1/0437/1375/7339/files/68833810121.pdf
    • https://cdn.shopify.com/s/files/1/0432/2741/4696/files/towemixagonujevadutuxox.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pisanebemewamabojesodid.pdf
    • https://cdn.shopify.com/s/files/1/0434/8618/3577/files/bhangra_dance_songs.pdf
    • https://cdn.shopify.com/s/files/1/0437/2683/1784/files/phlebotomy_practice_test_questions_a.pdf
    • https://cdn.shopify.com/s/files/1/0432/9956/9829/files/kevolemimotizojadiwamuxo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1775/7095/files/rekawipegodifax.pdf
    • https://bd6e42ee-571f-434d-b7e3-eac9d48cda79.filesusr.com/ugd/4cd51e_99d0b81d00bb422b926f943ba4a7c687.pdf?index=true
    • https://e0d22187-0da5-4a29-92cb-388fdb712f32.filesusr.com/ugd/f09a9d_9c9090e71f964d2092f5e319eb8907b7.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/8009/7687/files/pride_scooter_parts.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34007074416.pdf
    • https://cdn.shopify.com/s/files/1/0433/2440/7961/files/concerto_pour_deux_voix_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0439/6492/4062/files/apiculture_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/codehs_answers_java.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046d2.bin
592303fbef1f4a4314d32e6fb5603e1806c7589542b120f6e43893395998ad03
pdf-font-stream PDF embedded font (sfnt) at offset 0x46D2 4768 bytes
font_01_sfnt_off0000571c.bin
c6a04ae3dddcafec55b9d27fe3aefb69861489b8b7df48116aee41eb5298cd2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x571C 9584 bytes