Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e7582edd2176a05…

MALICIOUS

PDF

41.2 KB Created: 2020-09-16 21:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09afda1b5b822b68de82aa5862aae6bc SHA-1: 9fb9b603c1c002e5dd4a84450746fd871b603697 SHA-256: 4e7582edd2176a055a753a7d0b6843b74e88b9f3733a18b5df32a44c7bd9a1a1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. The primary malicious link, https://ttraff.link/wix?keyword=unblocked+games+site+9, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to "unblocked games site 9", suggesting a lure to attract users interested in such content. The ML classifier also strongly indicated maliciousness.

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=unblocked+games+site+9
    • https://cdn.shopify.com/s/files/1/0427/9071/5548/files/8083885035.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4432/files/terazadadukaganorimaj.pdf
    • https://cdn.shopify.com/s/files/1/0440/2741/2645/files/the_culture_clash_jean_donaldson.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/20062839498.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6437/files/miregokezelenukemokit.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7903/files/movies_counter_2017_bollywood_mubarakan.pdf
    • https://cdn.shopify.com/s/files/1/0434/4299/5352/files/84340928296.pdf
    • https://cdn.shopify.com/s/files/1/0432/7751/6955/files/89997359039.pdf
    • https://cdn.shopify.com/s/files/1/0431/6292/7263/files/dutuvamemumopavumu.pdf
    • https://cdn.shopify.com/s/files/1/0460/7108/7268/files/12740218406.pdf
    • https://cdn.shopify.com/s/files/1/0438/2405/4429/files/82829042038.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/barbell_medicine_training_templates.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94323725826.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_off00006346.bin
45c08d09c363038d70438f7bca3d966c1ed429222d5508459e9b9408bbacd008
pdf-font-stream PDF embedded font (sfnt) at offset 0x6346 5516 bytes
font_01_sfnt_off000075f6.bin
9310c7c20286785de531bbf9d1bdd4a8a930fda20cdf0bb273ad044d3900eaf2
pdf-font-stream PDF embedded font (sfnt) at offset 0x75F6 10024 bytes