Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9ed21e88de77f7c…

MALICIOUS

PDF

42.4 KB Created: 2020-08-22 02:11:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c0e22a8198390ca4d8cc549ae877f01 SHA-1: 531260f265e438b1a01045568cd526e757adb2ae SHA-256: f9ed21e88de77f7cc2374cb96622e5b740f8832f6c5ea4aa0e2be3a9824bdd28
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=bluetooth+keyboard+android+argos'. This indicates the document's purpose is to redirect users to potentially harmful websites, likely for phishing or malware delivery. The document body contains obfuscated text and URLs, further supporting this malicious intent.

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=bluetooth+keyboard+android+argos
    • http://files.art35n.org/uploads/1/3/2/6/132681488/gurapeverusisop.pdf
    • http://kinog.8citiesnb.com/uploads/1/3/0/8/130874493/bibaxinizevopo-nalagim-dufobagikux.pdf
    • http://files.gpsfirstaidtraining.com/uploads/1/3/1/4/131437862/ganasamuzitu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4421/files/arrow_icon_pack_android.pdf
    • https://cdn.shopify.com/s/files/1/0437/6385/9605/files/perpendicular_bisector_problems_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/45591664509.pdf
    • https://cdn.shopify.com/s/files/1/0430/9558/9013/files/past_tense_worksheet_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/40221101164.pdf
    • https://cdn.shopify.com/s/files/1/0434/3388/5846/files/fenabagetofedefozib.pdf
    • https://cdn.shopify.com/s/files/1/0437/9269/5456/files/sulijopuzikip.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/33571828953.pdf
    • https://cdn.shopify.com/s/files/1/0437/6900/4190/files/compliance_policy_guide_665._100.pdf
    • https://cdn.shopify.com/s/files/1/0452/1240/1815/files/statistics_and_probability_question_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0427/8019/7031/files/50725957973.pdf
    • https://cdn.shopify.com/s/files/1/0429/9603/9833/files/rosapimeneronirasiwateguf.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2054/files/kodefobesawaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/4455/9258/files/keep_bluetooth_on_airplane_mode_android.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.

FilenameKindSourceSize
font_00_sfnt_off000066b3.bin
e64bd45be184ec605bb5d64ff10024d56caf3e12414363cd78cc0a870b6a8801
pdf-font-stream PDF embedded font (sfnt) at offset 0x66B3 5444 bytes
font_01_sfnt_off00007935.bin
9612bf344c2a57e5d1731f09e40942d149803a5c98c363c9c99497daeef408b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7935 10320 bytes