Malicious PDF — malware analysis report

Static analysis result for SHA-256 88deedcc71e20acc…

MALICIOUS

PDF

41.5 KB Created: 2020-08-07 01:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2cd07d5d74a3c17bae76bd69dfb8ef5 SHA-1: dd9a823b61acce9e33200441be71558087aed2dd SHA-256: 88deedcc71e20acc22563bd0f8fb299c4de74e8f9ae4194efce6bba49d3dea63
150 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a link farm hosted on cdn.shopify.com, which is a common tactic for SEO poisoning to drive traffic to malicious sites. One critical heuristic identified a link to a known malicious redirector at ttraff.cc. The document body, though heavily obfuscated, contains text related to editing PDFs and the malicious URL, reinforcing the lure. The primary intent appears to be redirecting users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=how+to+edit+a+pdf+file+for+free+on+mac
    • http://dewat.losalamitosunit716.org/uploads/1/3/1/4/131407406/wimudefoninenasem.pdf
    • http://files.lotusbud.co.uk/uploads/1/3/1/4/131452904/482975.pdf
    • http://files.crosswindsfarmcreamery.com/uploads/1/3/0/9/130969471/b675bdb3b2450.pdf
    • http://files.hollyncoletta.com/uploads/1/3/1/0/131070178/7214957.pdf
    • https://cdn.shopify.com/s/files/1/0450/2428/0726/files/daydream_believer_piano.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8550/files/fafodusupat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43396058945.pdf
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/zivejibaliviribelivonate.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/datumaf.pdf
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/nudogudizadaxik.pdf
    • https://cdn.shopify.com/s/files/1/0433/8361/9736/files/ielts_academic_writing_task_1_sample_answer_band_9.pdf
    • https://cdn.shopify.com/s/files/1/0427/4946/0636/files/91519359126.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7660/files/conduction_of_heat_in_solids_carslaw_jaeger.pdf
    • https://cdn.shopify.com/s/files/1/0435/7115/1007/files/power_amplifier_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2135/files/losetofovevepoxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/gewijiletinor.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/7822200788.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_off0000646f.bin
333a5ce28634bc8a603fcebbb437f4742a383a3d6ef831ef41369a6b108179c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x646F 5176 bytes
font_01_sfnt_off00007606.bin
3356e66c34e292ad80a2a94ca8a82cab648b84d1557c31b4bce2e4350c0ba60e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7606 10284 bytes