Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b8b6c9dc6c01c7e…

MALICIOUS

PDF

44.1 KB Created: 2020-08-25 18:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2593b6405c88d2acea253b4a0ef3e206 SHA-1: 3c96ceeb2334367519f6e34cfa89aa1ec63ea955 SHA-256: 4b8b6c9dc6c01c7eb524cad51050feb85b2af85c1465a11f99d4684906854ae7
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=tushar+chande+the+new+technical+trad`. This indicates the document is likely designed to lure users to a malicious site. The presence of a large number of external PDF links, many hosted on `cdn.shopify.com`, suggests a link farm or SEO poisoning attempt to distribute malicious content. No scripts were extracted from this sample.

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.cc/pify?keyword=tushar+chande+the+new+technical+trad
    • http://files.sarahkost.com/uploads/1/3/1/1/131164153/dadixanatisav.pdf
    • http://kosozeko.lurlineavangeline.com/uploads/1/3/1/3/131383377/virokutav_rarajep.pdf
    • http://files.mrsnolanskindergarten.com/uploads/1/3/0/8/130874031/guwabatirabo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/88785387947.pdf
    • https://cdn.shopify.com/s/files/1/0461/9275/4841/files/gunrunning_gta_5_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69296453687.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/alliancerx_walgreens_prime_pa_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8836/files/tepilofupalumolozugugileb.pdf
    • https://cdn.shopify.com/s/files/1/0431/0745/1042/files/ncaa_basketball_uniforms_2018.pdf
    • https://cdn.shopify.com/s/files/1/0433/8712/5927/files/burexe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6406/6209/files/dutuxuruvumoxajeronufil.pdf
    • https://cdn.shopify.com/s/files/1/0432/2253/2251/files/ocean_of_books_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/3747/4472/files/wabufitobekekudaledolo.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_off00006a52.bin
f15a53f1d73016f1fe0577b25e2ffb889e52df2b35738de5583f540f8000aff0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A52 5068 bytes
font_01_sfnt_off00007b93.bin
1cae82921938172f9e87f90f42b11e53a097f86cc65fe5ee6d896c2b99e98186
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B93 13076 bytes