Malicious PDF — malware analysis report

Static analysis result for SHA-256 373b57ebaf5f5a58…

MALICIOUS

PDF

46.2 KB Created: 2020-09-06 12:46:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3dba4e04a8a61c5145615d0988500156 SHA-1: 29c45e7612cbb1942ec8bf64254c5209da677fb3 SHA-256: 373b57ebaf5f5a58ec8f0097868add20686351433a003f001b4f8daa97fb0060
140 Risk Score

Malware Insights

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

The PDF file contains a lure related to an academic form, which is a common tactic for phishing. It embeds multiple links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text fragments and URLs that reinforce the lure. The presence of a malicious redirector link suggests the intent is to lead the user to a compromised or malicious site.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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.me/wix?keyword=ahmadu+bello+university+direct+entry+form+2019
    • https://static.usrfiles.com/ugd/a1fb72_c334f8d1805f4ae8a7fe09f8d3cfcb04.pdf
    • https://static.usrfiles.com/ugd/529dbf_20f6d69950bc4651b37810470c993547.pdf
    • https://static.usrfiles.com/ugd/f4de5e_ef38c690fb1f4a20bb595294222be13f.pdf
    • https://static.usrfiles.com/ugd/362633_4ab27a2d573d4ab6b6f274dc0a1a9835.pdf
    • https://cdn.shopify.com/s/files/1/0427/8507/9452/files/75546106176.pdf
    • https://cdn.shopify.com/s/files/1/0435/9258/1288/files/rudidabovobunuforijevusus.pdf
    • https://cdn.shopify.com/s/files/1/0430/3503/3757/files/dawn_of_the_dead_1978_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/2798/8634/files/asnt_level_3_basic_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/0165/9043/files/linear_algebra_gate_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6919/files/893873929.pdf
    • https://static.usrfiles.com/ugd/5ed537_437fc3c98a5c476a874b91b3c9e700b7.pdf
    • https://static.usrfiles.com/ugd/33ab24_87acaf5b366449fa8bf3920853d9a04e.pdf
    • https://static.usrfiles.com/ugd/5be868_1ddbfdf5d443405eb7dcb4bc8f21f278.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_off0000666a.bin
05a732caeba891e476555b0f974778a273d6a9beaf096e0157d0297f256241e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x666A 5916 bytes
font_01_sfnt_off00007a6a.bin
146030b8b2a2bee6f6248f33aa9b1d23874f8d247e0ebb97c46ee659ea7d57e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6A 10360 bytes
font_02_sfnt_off00009daa.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DAA 4324 bytes