Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf9a8ee4a1c1cc91…

MALICIOUS

PDF

42.0 KB Created: 2020-08-05 17:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c80db8cf7e6b2ba64dfe07f33a73953 SHA-1: 4897619cd5507eb6b59fb3de8ce92a37c4aaae21 SHA-256: cf9a8ee4a1c1cc911db0f0f505f042aee7796e34764ce2a3e11a5cc31b41258d
128 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic firing indicates a direct link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=haloalkanes+haloarenes+notes+pdf'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The presence of a 'Download Button' heuristic further supports a lure-based attack pattern.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=haloalkanes+haloarenes+notes+pdf
    • http://files.adamphuff.com/uploads/1/3/2/7/132710592/rokirem.pdf
    • http://loronalu.361security.com/uploads/1/3/0/7/130738848/b0645850.pdf
    • http://files.waterfrontmarysville.com/uploads/1/3/1/8/131857315/7828894.pdf
    • http://files.themedicalscienceeditor.org/uploads/1/3/1/3/131380163/vexef_kenuzijur.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/52258950351.pdf
    • https://cdn.shopify.com/s/files/1/0437/5209/5898/files/livro_python_para_anlise_de_dados.pdf
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/zuvamuzewikozijiseruji.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/43557466471.pdf
    • https://cdn.shopify.com/s/files/1/0435/1875/4971/files/60737851807.pdf
    • https://cdn.shopify.com/s/files/1/0430/0419/9075/files/51558219191.pdf
    • https://cdn.shopify.com/s/files/1/0430/9647/3749/files/36093985134.pdf
    • https://cdn.shopify.com/s/files/1/0436/9760/2713/files/53540982957.pdf
    • https://cdn.shopify.com/s/files/1/0438/6032/8608/files/52414731047.pdf
    • https://cdn.shopify.com/s/files/1/0438/8493/7384/files/amway_atmosphere_sky.pdf
    • https://cdn.shopify.com/s/files/1/0438/0593/3730/files/7121406361.pdf
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/fokaxutubenese.pdf
    • https://cdn.shopify.com/s/files/1/0429/9898/8949/files/36277569190.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/nolepofidefijajatokopen.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_off00006696.bin
7c046ea178f9e2416b2d177d765bdce612bf9e6e35c7ec5ed2c9980061133960
pdf-font-stream PDF embedded font (sfnt) at offset 0x6696 5152 bytes
font_01_sfnt_off00007811.bin
d69bff92dd9f48954eb3840112926071e5f76a7f79df7e0e8f288d3d7c715c98
pdf-font-stream PDF embedded font (sfnt) at offset 0x7811 10204 bytes