Malicious PDF — malware analysis report

Static analysis result for SHA-256 649d396b9889bab3…

MALICIOUS

PDF

43.9 KB Created: 2020-08-11 00:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e4e35aa57016751366d199225d9d623 SHA-1: 96304da00f3b1d021bef50f41c20b856a7ce5603 SHA-256: 649d396b9889bab37759c55044c8657da99dfb5f6f5efdbcbe11f11a26908056
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a "Dubai metro map pdf download" which redirects to a malicious URL. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. The embedded content, while obfuscated, contains URLs that are likely part of the malicious infrastructure.

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=dubai+metro+map+pdf+download
    • http://files.pettyharbourmaddoxcove.ca/uploads/1/3/0/7/130776183/sovabumanomuzezowu.pdf
    • http://files.mitradingschool.com/uploads/1/3/1/6/131607054/zamelo.pdf
    • http://files.consulateofswedensandiego.org/uploads/1/3/1/4/131454355/sulilurediwe_jubelarak_boguka_firibiwawafel.pdf
    • http://files.mariestewartconservation.com/uploads/1/3/1/4/131408103/2658431.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/malagazexugedupetus.pdf
    • https://cdn.shopify.com/s/files/1/0429/3066/7673/files/font_awesome_webpack.pdf
    • https://cdn.shopify.com/s/files/1/0437/8125/9421/files/67458543514.pdf
    • https://cdn.shopify.com/s/files/1/0434/0393/5911/files/nufaxasasupewonudukuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sekokejeninidifowabofu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1028/5983/files/dulofawa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57148414383.pdf
    • https://cdn.shopify.com/s/files/1/0431/9071/4532/files/rekosigobes.pdf
    • https://cdn.shopify.com/s/files/1/0434/0652/4566/files/akbars_manchester_menu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/tafebazuteparemudax.pdf
    • https://cdn.shopify.com/s/files/1/0430/8742/9785/files/letilixigikirazorujuzimex.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_off00006e20.bin
b5ccec6e66ad9cbc00c3dda87a28d9e114c1df0f72271f7de0f35578f997d05a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E20 5240 bytes
font_01_sfnt_off00007fe9.bin
cd15ead97cda95b190d51ccd2dd26ad5f4dbacda8e7d0adf8866a46a4df5310e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE9 10260 bytes