Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7181ac42bf103de…

MALICIOUS

PDF

46.0 KB Created: 2020-08-04 23:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf9ac1378c4a81f151abf4d6f91ff34b SHA-1: 6903c61e4119c05f0b3fea2dec26e8f1face957a SHA-256: a7181ac42bf103de1808e404f843ac94de5692a52bcbc35b19c2200ffd7affb9
150 Risk Score

Malware Insights

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

The PDF file contains a link disguised as a document about 'succession planning'. This link, https://ttraff.cc/pify?keyword=define+succession+planning+pdf, redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious nature of the file. The presence of numerous external PDF links, many pointing to cdn.shopify.com, suggests a link farm or SEO poisoning tactic to distribute the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=define+succession+planning+pdf
    • http://files.bearcatwrestlingclub.com/uploads/1/3/1/3/131384468/rusinojabat.pdf
    • http://files.100daysofworkouts.com/uploads/1/3/0/8/130873918/xevelulikazise.pdf
    • http://files.theultraphilosopher.com/uploads/1/3/0/9/130969577/rewonuxuv-gakegejewazo.pdf
    • http://files.deathcog.com/uploads/1/3/1/4/131438077/jafirujos.pdf
    • https://cdn.shopify.com/s/files/1/0431/8278/4676/files/50282634797.pdf
    • https://cdn.shopify.com/s/files/1/0438/0993/1424/files/84671213021.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8036/files/transformers_age_of_extinction_imax_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/5412/7521/files/iphone_6_3.pdf
    • https://cdn.shopify.com/s/files/1/0434/4827/1000/files/algorithm_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0429/7211/9193/files/ximipegali.pdf
    • https://cdn.shopify.com/s/files/1/0431/6286/1730/files/30264874685.pdf
    • https://cdn.shopify.com/s/files/1/0430/0485/4426/files/57161822063.pdf
    • https://cdn.shopify.com/s/files/1/0428/1974/7999/files/kojixebovazozisukep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0379/6894/files/66771299578.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4870/files/kinerekipofefimuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/tibevesotulifunasivave.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/32455240266.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_off00007584.bin
ab7acd07907c89b810b74c5498c042eec1263576d9554bc0484e6eabab9e6972
pdf-font-stream PDF embedded font (sfnt) at offset 0x7584 5228 bytes
font_01_sfnt_off0000876f.bin
9874d5c9597eb1bde02f628e86b089e43230c2144ca02a991eb6f59b99a3e6ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x876F 10240 bytes