Malicious PDF — malware analysis report

Static analysis result for SHA-256 229b203ab9fa46b5…

MALICIOUS

PDF

51.2 KB Created: 2020-08-13 06:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4961417d26ac6e32c90834af07ab9626 SHA-1: 42e92493862ab0d2d8f0faa5e29578e4a06e3530 SHA-256: 229b203ab9fa46b5eb3e04c45f61e7f77ee3b486d6f0bd1901cb2d5440ce1a8c
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain. The document body, though heavily obfuscated, contains text related to 'greatest common factor worksheet 4th grade pdf' and the malicious URL. This suggests a lure to disguise malicious redirection, likely for phishing or malware delivery. No scripts were extracted from this sample.

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=greatest+common+factor+worksheet+4th+grade+pdf
    • http://files.peachtreetally.net/uploads/1/3/1/0/131070579/voxoxawegurikujig.pdf
    • http://kalina.cartwheelsandpinwheels.com/uploads/1/3/0/7/130775795/fd9d1.pdf
    • http://files.garykearneyart.com/uploads/1/3/1/4/131483009/muzexuwebiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/2368265420.pdf
    • https://cdn.shopify.com/s/files/1/0438/2556/1757/files/captive_prince_book_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/36359715849.pdf
    • https://cdn.shopify.com/s/files/1/0438/5013/7760/files/hoobastank_the_reason.pdf
    • https://cdn.shopify.com/s/files/1/0437/3423/7345/files/lujuvabulu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5604/4951/files/etiologi_abortus_imminens.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84712881745.pdf
    • https://cdn.shopify.com/s/files/1/0436/6378/6137/files/64051763827.pdf
    • https://cdn.shopify.com/s/files/1/0434/9798/0056/files/54781652693.pdf
    • https://cdn.shopify.com/s/files/1/0428/6863/7862/files/linear_algebra_examples_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0435/4103/7208/files/blueprint_book_nicholas_christakis.pdf
    • https://cdn.shopify.com/s/files/1/0434/6744/0294/files/maytag_performa_dishwasher.pdf
    • https://cdn.shopify.com/s/files/1/0437/0766/2504/files/atp_adp_cycle_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/zexijozuxote.pdf
    • https://cdn.shopify.com/s/files/1/0431/3789/2509/files/43484006452.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
font_00_sfnt_off0000734d.bin
181393f0a329341328bc5ba8c22d88836d14ea685eb55c0785890d6be93bdde4
pdf-font-stream PDF embedded font (sfnt) at offset 0x734D 5812 bytes
font_01_sfnt_off0000870f.bin
5d22a07f8449eab37a3c621a55e0df5543480b8f53dd2e18461581a12b738c47
pdf-font-stream PDF embedded font (sfnt) at offset 0x870F 10044 bytes
font_02_sfnt_off0000a9a1.bin
64e13322576ebe4b9a20b8efdba1cb2c8bc01163a7c4e1ba1f667a2d7cf8e6df
pdf-font-stream PDF embedded font (sfnt) at offset 0xA9A1 16116 bytes