Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa062ca2c1072b39…

MALICIOUS

PDF

48.7 KB Created: 2020-08-07 19:25:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8736f124d6af52ca5abac7004a66235 SHA-1: 397d94ec90d8a1bff38efec0ab773904be7e1266 SHA-256: aa062ca2c1072b39ce97adde9ef380d01bf2b01fd0c29a37049806696ed11f3d
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The embedded links, particularly the one to 'ttraff.cc', suggest a redirection chain designed to lead the user to a malicious site, likely for phishing or malware delivery. The presence of numerous Shopify links, while some are benign, contributes to the link farm characteristic.

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=matura+podstawowa+angielski+s%25C5%2582ownictwo+pdf
    • http://files.jsmaxwell.com/uploads/1/3/1/1/131163590/1627488.pdf
    • http://rumuziw.debattierclub-muenchen.de/uploads/1/3/1/4/131453284/vigeraze-bebobavulu-bibowufok.pdf
    • http://files.kirajewellerickson.com/uploads/1/3/1/3/131381602/zujiwan.pdf
    • https://cdn.shopify.com/s/files/1/0432/8525/0216/files/century_21_accounting_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/xokunepiladi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0381/2773/files/3055252399.pdf
    • https://cdn.shopify.com/s/files/1/0433/9692/3555/files/busser_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/gipamuwokudanixofapufipo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wemulaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/buzedafasufiwagadudepupes.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/guravawogopudided.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/28086805419.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/1607459743.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/68408334523.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/sanofugo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2096/8351/files/4856951730.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000654b.bin
2e36c3f45bb624b05fdfe6ec1f45c2cea1f0119c2683a8b867e4a1afeddfe34b
pdf-font-stream PDF embedded font (sfnt) at offset 0x654B 5420 bytes
font_01_sfnt_off000077df.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x77DF 1800 bytes
font_02_sfnt_off0000806d.bin
629102babea50e86bed69f6b1a25a9d0c1bccfc642eecb44633c5043f2685c1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x806D 11396 bytes
font_03_sfnt_off0000a4a4.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4A4 4324 bytes