Malicious PDF — malware analysis report

Static analysis result for SHA-256 493618f5973e2195…

MALICIOUS

PDF

135.5 KB Created: 2020-08-17 11:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3add7cc50e714b49a9b61f165dabcbd5 SHA-1: 54a336c7cfef6071c5b75cb6d81719ae3964058f SHA-256: 493618f5973e21957fdddead1145a0decc11e33c877237f9fe6f2d625109ac1e
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting educational content ('Teacher's guide math 9 unit 4') which is likely a lure. The primary heuristic indicates the PDF links to known malicious redirector infrastructure, suggesting a phishing or malware distribution attempt.

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.ru/pify?keyword=teacher%2527+s+guide+math+9+unit+4
    • http://files.canapax.net/uploads/1/3/1/4/131452741/086c13cfa40f7cc.pdf
    • http://files.elpasoalfalfa.org/uploads/1/3/2/7/132741064/97929961aa5.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/amcat_aptitude_test_papers_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/8837/9032/files/deresubitujuvarodijoka.pdf
    • https://cdn.shopify.com/s/files/1/0430/9860/3669/files/modoo_marbel_online.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6653/files/70069831764.pdf
    • https://cdn.shopify.com/s/files/1/0437/3292/6615/files/2020_telugu_festival_calendar.pdf
    • https://cdn.shopify.com/s/files/1/0438/4020/9056/files/29447526830.pdf
    • https://cdn.shopify.com/s/files/1/0454/7867/4584/files/dokuvovitigevuvevi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5960/9753/files/windows_7_activation_key.pdf
    • https://cdn.shopify.com/s/files/1/0434/1081/7180/files/physiology_in_nutshell_ak_jain.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7104/files/3482056854.pdf
    • https://cdn.shopify.com/s/files/1/0429/9387/7145/files/gutuwisasasok.pdf
    • https://cdn.shopify.com/s/files/1/0439/9572/5982/files/16800373442.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/92723111902.pdf
    • https://cdn.shopify.com/s/files/1/0437/1120/1435/files/antrenmanla_geometri_2.pdf
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/zapudiwum.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ac14.bin
caaba34bda0f0a2eee83ab5d104f37efa5161df520475258d32264f4216373a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC14 1580 bytes
font_01_sfnt_off0001b3ea.bin
ec6f2e646bd676a2bdd4bcd876b462d125bba2be09e563c8fe33164ec9752568
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B3EA 5548 bytes
font_02_sfnt_off0001c6ae.bin
49b189e5ff9e7d8f041bcad7abbf02894f4350b1faa9e7722d9de5312964b723
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6AE 15952 bytes
font_03_sfnt_off0001f87e.bin
c1cdfb40f4ff0fd38d93afdf798e838630aea926ff5bdfce4d70ad8840aabf0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F87E 16796 bytes