Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae8b50111ed6023…

MALICIOUS

PDF

60.1 KB Created: 2020-08-06 02:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90f965d07bd1c0c99eb59c1acaaebba0 SHA-1: a1bbf70d233e2b998bbfc8973a91580d2e28f499 SHA-256: fae8b50111ed60231009f0b5d941d5617cfc3b0c3d6ae39e3b666caa9604e2e6
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a malicious domain, disguised as an 'Assam tet 2020 syllabus pdf lp'. This is a common lure to trick users into visiting a potentially harmful website. The file also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic to increase visibility of the malicious redirector.

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.com/pify?keyword=assam+tet+2020+syllabus+pdf+lp
    • http://files.lionessenergetics.com/uploads/1/3/2/7/132740270/zususojax.pdf
    • http://files.maggiemccabeart.com/uploads/1/3/1/4/131452976/bipusumubebov-dosapof-ziduga-morabutorebe.pdf
    • http://files.rosesrags.net/uploads/1/3/1/4/131453902/4190130.pdf
    • http://files.mypittsburgchamber.org/uploads/1/3/1/3/131379732/vipot.pdf
    • http://files.southamericarealstate.com/uploads/1/3/2/7/132741385/4163b.pdf
    • https://cdn.shopify.com/s/files/1/0438/5308/6885/files/butevavo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0601/7186/files/java_iterate_through_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/kuzisobekobadipan.pdf
    • https://cdn.shopify.com/s/files/1/0432/0064/3236/files/46458608407.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/molizodugujuzugarizonov.pdf
    • https://cdn.shopify.com/s/files/1/0438/9748/7512/files/degesijenanopepifuxonuda.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/waripuguwabopus.pdf
    • https://cdn.shopify.com/s/files/1/0438/3460/5728/files/milubexoxunetexemav.pdf
    • https://cdn.shopify.com/s/files/1/0440/2633/1286/files/collins_proline_21_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/6336/0153/files/affairscloud_weekly_september_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/77279429242.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/39074744561.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_off00007b0e.bin
4edd2e7eb139c08d0993d7ee2aa0d894325e04ccbbc1426b6bbf7f13d748c545
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B0E 5212 bytes
font_01_sfnt_off00008ccb.bin
3755c8448b00afe612706d8fec41824030072adea4226f05eae563e2bb214360
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCB 12488 bytes
font_02_sfnt_off0000b2b7.bin
0c97b20f462f5629eb1e97486a053eab6493372f4b5c0f6adc1629a677b048db
pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B7 10100 bytes
font_03_sfnt_off0000d514.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD514 4324 bytes