Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b64b719e6e695d0…

MALICIOUS

PDF

36.8 KB Created: 2020-07-31 22:05:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c138b3fec94ff3ebb2dd4a8368f8d7fb SHA-1: 13b25d5cd778010dc13d1ea83c400cb502d44ff5 SHA-256: 7b64b719e6e695d0b61117e3f7e8d402562e53204c09a999b62169b1e2d3b35b
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 at least one identified as a malicious redirector. The document body, though obfuscated, contains the URL 'https://ttraff.com/pify?keyword=magic+selena+gomaz', which is flagged as malicious. This suggests the document's primary purpose is to lure users into clicking these links, likely leading to a phishing site or malware download.

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.com/pify?keyword=magic+selena+gomaz
    • http://files.southwesterngmtc.com/uploads/1/3/1/8/131856079/d7a3140bf.pdf
    • http://files.kingsquidjigs.com/uploads/1/3/1/6/131637218/3153602.pdf
    • http://files.dianeshaneschuldt.com/uploads/1/3/2/7/132740620/dab3e2c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/75070888696.pdf
    • https://cdn.shopify.com/s/files/1/0437/5350/4917/files/pilar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lipowu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0895/8362/files/wutanemozatiga.pdf
    • https://cdn.shopify.com/s/files/1/0432/3776/9384/files/beavers_bend_fly_shop.pdf
    • https://cdn.shopify.com/s/files/1/0435/1583/8618/files/pazutaruki.pdf
    • https://cdn.shopify.com/s/files/1/0440/3894/6981/files/nokajujusekopumatuganopa.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5256/files/46835670018.pdf
    • https://cdn.shopify.com/s/files/1/0429/5226/1795/files/66974699594.pdf
    • https://cdn.shopify.com/s/files/1/0428/2092/7655/files/fijavisefev.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/mivibu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004892.bin
008d70808a920afee10ffc4665bac7007367386560bdd9e834f861b714785118
pdf-font-stream PDF embedded font (sfnt) at offset 0x4892 4788 bytes
font_01_sfnt_off000058bb.bin
e822d2a32e8a5c5afa203eda86eda6ffcbfa9b71958f21a722384e7633212387
pdf-font-stream PDF embedded font (sfnt) at offset 0x58BB 9348 bytes
font_02_sfnt_off000078b2.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x78B2 4324 bytes