Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb4010e3ba3b02ee…

MALICIOUS

PDF

41.5 KB Created: 2020-08-08 01:59:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 891612ea559d810d7e82e97b51269400 SHA-1: db1ba1d2cd3735896610aa9e58f5907b75059d63 SHA-256: cb4010e3ba3b02eecc729d0cf1d89da80a54551c2fecf3e90ad65528f96c65b1
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, https://ttraff.com/pify?keyword=class+11th+chemistry+practical+book+pdf, is identified as a redirector. Additionally, a large number of links to Shopify domains were found, suggesting a link farm for SEO poisoning or distribution. The document body contains garbled text but includes the malicious URL and a call-to-action phrase, reinforcing the lure.

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.com/pify?keyword=class+11th+chemistry+practical+book+pdf
    • http://files.creativationevents.com/uploads/1/3/2/6/132680986/waxadevepi.pdf
    • http://files.mycommentsandthoughts.com/uploads/1/3/1/3/131378774/ritibekajagaposo.pdf
    • http://files.core-nmsu.org/uploads/1/3/0/8/130814288/jabitijatufo.pdf
    • http://files.voltsportswear.com/uploads/1/3/0/9/130969740/6481647.pdf
    • https://cdn.shopify.com/s/files/1/0432/3937/5012/files/laxoxosofodupusezal.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/96925898372.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/panetixiwepapofenajujolov.pdf
    • https://cdn.shopify.com/s/files/1/0433/7988/4186/files/80816601605.pdf
    • https://cdn.shopify.com/s/files/1/0430/5652/9565/files/nexomisugubadeso.pdf
    • https://cdn.shopify.com/s/files/1/0434/1055/5034/files/tuvotenamaruzifosanuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/4026/8711/files/63359740577.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/33833550958.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/economic_effects_of_air_pollution.pdf
    • https://cdn.shopify.com/s/files/1/0432/0614/8255/files/sazujabivi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0337/7824/files/classes_of_organic_compounds_and_functional_groups.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nisexabidubukov.pdf
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/used_car_checklist_uk.pdf
    • https://cdn.shopify.com/s/files/1/0432/1663/4011/files/88788513906.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_off00006381.bin
d0d9c39f3eb8f860756640bf4b7519351e2c000364dbb721266170e7ccb28f3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6381 5656 bytes
font_01_sfnt_off00007695.bin
0cd10df680e8b30641114db27e2f2c651237e3bce5f09982ca5821318dc2198a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7695 10060 bytes