Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6cbf5d11c06207…

MALICIOUS

PDF

45.2 KB Created: 2020-08-04 03:39:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43d8ec7f1f80e0d67f9c8584bec50514 SHA-1: 524dadf7a7df1773407776887fdead70239c4f99 SHA-256: de6cbf5d11c062071975953d97ac14542bdaa302aaed4027412ac26f2eeec7de
160 Risk Score

Malware Insights

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

The PDF file contains a heuristic match for a malicious redirector link and a link farm, indicating it's designed to lead users to malicious sites. The document body and heuristics suggest an advance-fee scam lure, disguised as educational material. The primary malicious IOC is the redirector URL, which is used to funnel victims to further malicious content.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=4th+grade+summer+math+review+pdf
    • http://files.holycow.studio/uploads/1/3/1/4/131437633/10e7e34c5.pdf
    • http://zejavuwax.ginnyscoffeehouse.com/uploads/1/3/1/6/131606201/4645292.pdf
    • http://files.herothrillshow.org/uploads/1/3/1/4/131483830/zufukidojadega.pdf
    • https://cdn.shopify.com/s/files/1/0438/0321/3984/files/murapadikaxapugabebimepeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/2315/5878/files/62524033612.pdf
    • https://cdn.shopify.com/s/files/1/0432/7853/2761/files/92369369421.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/10104584173.pdf
    • https://cdn.shopify.com/s/files/1/0448/3586/4736/files/coagulant_and_anticoagulant_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0433/5150/7094/files/number_system_aptitude_tricks_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/0609/1673/files/82261427040.pdf
    • https://cdn.shopify.com/s/files/1/0431/5021/3274/files/figure_drawing_for_fashion_design_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/1935/3757/files/88302610077.pdf
    • https://cdn.shopify.com/s/files/1/0432/2315/4850/files/tyranids_painting_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7485095273.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/wovewu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/jixosegodojulimapetojil.pdf
    • https://cdn.shopify.com/s/files/1/0434/6871/8233/files/sugoguno.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_off00007109.bin
d05955aa66731d6679be066652eed45a8b78d8f841c4e9a7e1676dbdc4e9a3fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7109 5568 bytes
font_01_sfnt_off000083eb.bin
b893048b1710dc6aca8cfa0c56bd16826f50f7d0490b0debfa0019598431f97e
pdf-font-stream PDF embedded font (sfnt) at offset 0x83EB 10412 bytes