PDF malware analysis — malicious · 44a5c35764c9cac5

MALICIOUS

PDF

39.6 KB Created: 2020-09-02 02:28:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d3c06c2ba075b891b9bf847281a4c005 SHA-1: f3edf52614f4117940bb68285f8b8fbaf4823ad4 SHA-256: 44a5c35764c9cac566c5df2fa3f402613547f088c16d2201976429d97f6f95d5

168 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a search result for an academic PDF. It also hosts a large number of external PDF links, likely for SEO manipulation to improve the ranking of the malicious link. The presence of a 'Visible LOLBin command execution instruction' heuristic suggests that the PDF may be attempting to execute commands or download further payloads, although no specific script was extracted to confirm this.

Heuristics 5

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.
Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND

Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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/wix?keyword=nutrition+an+applied+approach+5th+edition+pdf
- https://cdn.shopify.com/s/files/1/0431/1423/4013/files/medicinal_plants_project_in_bengali.pdf
- https://cdn.shopify.com/s/files/1/0434/0324/7781/files/oxford_word_skills_advanced_book_download.pdf
- https://cdn.shopify.com/s/files/1/0438/9673/3864/files/transition_words_worksheet_middle_school.pdf
- https://cdn.shopify.com/s/files/1/0436/6221/3273/files/english_crossword_puzzle_with_answers.pdf
- https://static.usrfiles.com/ugd/c63dba_3e54276dcdea4b7fb35547944486d898.pdf
- https://static.usrfiles.com/ugd/3bf302_eb6321ffa2e54720a5da317cc986f4bb.pdf
- https://static.usrfiles.com/ugd/e3c460_38235408538d47928a3fa6dd429ff861.pdf
- https://cdn.shopify.com/s/files/1/0433/7310/1214/files/vusomukuw.pdf
- https://cdn.shopify.com/s/files/1/0434/5564/3813/files/standard_costing_and_variance_analysis_exam_questions.pdf
- https://cdn.shopify.com/s/files/1/0433/1077/6473/files/curly_brackets_in_format_string_python.pdf
- https://cdn.shopify.com/s/files/1/0441/3577/6408/files/activate_a2.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005c96.bin` `ecd88b6aa0c7b686c9802848b300fceec0a54d8aa795b5bb95436e8b4e6f1e2d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5C96	5156 bytes
`font_01_sfnt_off00006e24.bin` `fd6358814c04edbe1f811d60a08fca7c8b1df59d468e705ad81c5f9628bae620`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6E24	10544 bytes

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