Malicious PDF — malware analysis report

Static analysis result for SHA-256 2abd6805d4a09c70…

MALICIOUS

PDF

51.2 KB Created: 2020-08-26 10:15:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e32448b2c919fa34960ee3c23c840751 SHA-1: 466316672ac1431e8932025339cbc035e6fcd8be SHA-256: 2abd6805d4a09c70a13aaf57c439f0431e71d385fdd2c0e21f30d02035eabd49
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a lure for a 'mass effect 2 dlc authorization crack' which, when clicked, redirects to a malicious URL. The PDF also contains a large number of external links, many pointing to Shopify, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL.

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.me/pify?keyword=mass+effect+2+dlc+authorization+crack
    • http://files.anusaindigenous.com/uploads/1/3/1/4/131437666/vulajeluwulezuserag.pdf
    • http://bytlly.com/1axo9x
    • https://cdn.shopify.com/s/files/1/0440/1872/9110/files/lonely_planet_guide_berlin.pdf
    • https://cdn.shopify.com/s/files/1/0435/1954/1416/files/depression_causes_and_treatment_beck.pdf
    • https://cdn.shopify.com/s/files/1/0433/9456/4250/files/wabixisofiner.pdf
    • https://cdn.shopify.com/s/files/1/0436/3812/8793/files/kelekofibu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/38417548939.pdf
    • https://cdn.shopify.com/s/files/1/0432/1483/1780/files/79214431780.pdf
    • https://cdn.shopify.com/s/files/1/0437/1765/6731/files/13296101179.pdf
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/93183704000.pdf
    • https://cdn.shopify.com/s/files/1/0429/8443/9971/files/dajimagun.pdf
    • https://cdn.shopify.com/s/files/1/0433/2165/5464/files/98087779092.pdf
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/joxugudanamaxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9289/3095/files/72551689599.pdf
    • https://cdn.shopify.com/s/files/1/0437/7850/6909/files/6824345313.pdf
    • https://cdn.shopify.com/s/files/1/0433/2158/9913/files/53807180927.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_off00008727.bin
b81d9480458a94f2f986faf91c7a6847ba12cca90f559e604e991f1cc96aab84
pdf-font-stream PDF embedded font (sfnt) at offset 0x8727 5360 bytes
font_01_sfnt_off00009964.bin
c558c2eb583e107cdd97253f47ed0a2586773d3505a75dca0c3f2cc0b361cfc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x9964 11384 bytes