Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e8be84375d031f1…

MALICIOUS

PDF

47.4 KB Created: 2020-08-19 10:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9382c07bc824104a391780b859310bd1 SHA-1: 3d590bc4397b4bd0d60971298a4619f3acf4aabb SHA-256: 7e8be84375d031f1d70242b4465751c4d5b780cd5238049de9fbdedb0c2d4e62
160 Risk Score

Malware Insights

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

The PDF file contains a lure related to a "Byju's app cracked apk" and includes a critical heuristic firing for a malicious redirector link pointing to `https://ttraff.ru/pify?keyword=byju%2527+s+app+cracked+apk`. This indicates an attempt to trick the user into visiting a malicious site. The document also exhibits characteristics of an advance-fee scam, further supporting the malicious intent.

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.ru/pify?keyword=byju%2527+s+app+cracked+apk
    • http://gokade.jesurbanfarms.com/uploads/1/3/2/6/132683459/kidevokuj_pigosefa_xowizekivivi.pdf
    • http://files.suchipottery.com/uploads/1/3/1/4/131406841/745292.pdf
    • http://files.neverquitneverdie.org/uploads/1/3/1/4/131406258/xeduxi_pusuwigude_fomixugane.pdf
    • https://cdn.shopify.com/s/files/1/0435/9120/5021/files/finger_arthritis_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0428/6837/5719/files/37199354332.pdf
    • https://cdn.shopify.com/s/files/1/0432/7528/8732/files/pdf_viewer_toolbar_missing.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wetitoditasenubekuxon.pdf
    • https://cdn.shopify.com/s/files/1/0437/2388/2664/files/senexinosenibofupag.pdf
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/pilotaminozerel.pdf
    • https://cdn.shopify.com/s/files/1/0433/2018/0894/files/62039661677.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/14127651685.pdf
    • https://cdn.shopify.com/s/files/1/0437/0163/3177/files/ambiano_food_dehydrator_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0435/1718/2104/files/95625794702.pdf
    • https://cdn.shopify.com/s/files/1/0432/1103/0683/files/yahoo_wikipedia.pdf
    • https://cdn.shopify.com/s/files/1/0435/2658/6519/files/52346758346.pdf
    • https://cdn.shopify.com/s/files/1/0436/8960/7321/files/dibumeriwo.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/
    • https://cdn.shopify.com

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ace.bin
dbcacb933be642a1b06d7b764b6b7ee0f545b56884e78f15c4194e72574e147b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACE 5360 bytes
font_01_sfnt_off00008d2d.bin
6223934089a0e8482c2c681f97530f282e3bebd71464943f96d56d39e7f3f310
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D2D 10372 bytes