Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef2e80066e230a60…

MALICIOUS

PDF

40.3 KB Created: 2020-09-02 20:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0eb3997c33eafdb0601c130be40ddc99 SHA-1: ee0c929ccb329683b7f59aff2072ad347f6db55f SHA-256: ef2e80066e230a60df0a78f22bd95b74808d0351e42d4084f197aa62cca00d17
152 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one pointing to a known malicious redirector. This redirector is likely used to obscure the final destination, which is probably malicious. The presence of a large number of external PDF links, many hosted on Shopify, suggests an attempt to manipulate search engine results for malicious purposes. 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.ru/wix?keyword=arcgis+pro++basemap
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7082322425.pdf
    • https://cdn.shopify.com/s/files/1/0431/0823/7473/files/45846387610.pdf
    • https://cdn.shopify.com/s/files/1/0440/6679/9766/files/zapufutekebisirojorela.pdf
    • https://cdn.shopify.com/s/files/1/0439/4074/1278/files/ruzapinurofadimuredoje.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3772/files/67524377683.pdf
    • https://cdn.shopify.com/s/files/1/0437/5959/9777/files/xumifuwuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/bojomazewopebiluvawolipem.pdf
    • https://cdn.shopify.com/s/files/1/0439/8442/1022/files/sherlock_holmes_in_the_22nd_century.pdf
    • https://cdn.shopify.com/s/files/1/0430/1789/6089/files/wajajak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48695811849.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/reading_skills_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99640144283.pdf
    • https://cdn.shopify.com/s/files/1/0463/3539/3953/files/16676672369.pdf
    • https://cdn.shopify.com/s/files/1/0432/1283/2932/files/mumbai_125_km_3d.pdf
    • https://cdn.shopify.com/s/files/1/0429/8876/5337/files/sony_android_tv_oreo_update_2019.pdf
    • https://cdn.shopify.com/s/files/1/0432/6175/5547/files/ac_delco_oil_filter_lookup_guide.pdf
    • https://cdn.shopify.com/s/files/1/0461/7266/8057/files/37747180992.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/coordinate_graphing_worksheets_halloween.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_off0000605a.bin
f9ba35e1f4e47779f19d3110d528dbce5b39fb57c48c263d82ba70c5254a90a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x605A 5352 bytes
font_01_sfnt_off0000727a.bin
7ebb7d997552b60979874c950d775d85663012039a36d858234fa30e9bc3415e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x727A 10020 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.