Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea1944678c0b7969…

MALICIOUS

PDF

44.0 KB Created: 2020-08-18 15:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c43982cf928140dc3bc2e8e3943faf3 SHA-1: 7680c405998cceb66070f718e4adff8478887191 SHA-256: ea1944678c0b7969a38febb4d7ab82b932671f6fd06f38989f2788a8e920dae1
220 Risk Score

Malware Insights

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

The PDF contains an embedded script payload and a malicious redirector link disguised as an application form sample for a job. The link at https://ttraff.cc/pify?keyword=application+form+sample+for+job redirects to further infrastructure, indicating a phishing or malware delivery attempt. The presence of multiple PDF links, some pointing to benign content on Shopify, suggests a link farm tactic to improve search engine visibility for malicious content.

Heuristics 6

  • 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 script payload in PDF stream high PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain script execution markers such as ActiveXObject/CreateObject, WScript.Shell, PowerShell, or shell-exec primitives. This is stronger than ordinary PDF JavaScript because it indicates a staged external script payload hidden in stream bytes.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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=application+form+sample+for+job
    • http://files.mhfirstresponse.org/uploads/1/3/0/7/130738657/7330469.pdf
    • http://laleziw.lorettolink.org/uploads/1/3/1/4/131438216/721827.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/81465956036.pdf
    • https://cdn.shopify.com/s/files/1/0431/6237/0202/files/hodgdon_reloading_data.pdf
    • https://cdn.shopify.com/s/files/1/0433/9679/2471/files/carboplatino_vademecum.pdf
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/39358084971.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8905/files/what_is_the_purpose_of_powershell.pdf
    • https://cdn.shopify.com/s/files/1/0435/4713/2063/files/zapf_calligraphic_801_font_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/39127860410.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sobobubujuwin.pdf
    • https://cdn.shopify.com/s/files/1/0428/5464/5916/files/zamefanegugasefevu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1608/4891/files/guide_michelin_corse_2018.pdf
    • https://cdn.shopify.com/s/files/1/0454/6166/7992/files/62231875963.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00002ce4.bin
5cea0e7054027885f508d8eddeb2fab1e2d16527def8216942fed24e109e522d		 pdf-embedded-script PDF decompressed stream script payload at offset 0x2CE4 92 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s).
font_00_sfnt_off00006670.bin
ee234b320ac10c3cdfa5a631dfde24a733a12f9c67be166507fb5b7c73f3ac90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6670 5368 bytes
font_01_sfnt_off00007891.bin
17d304bffb7428a41587c3376f00c00f2d135502143e334b6fbd4348d74c16b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7891 13588 bytes

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