Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee295a544c68c7e7…

MALICIOUS

PDF

57.9 KB Created: 2020-08-10 10:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35586e4ab8ad5b0d9f6a8417c8bb4d16 SHA-1: a5ffab3a13f70e159db651ee5c32e9690e45c798 SHA-256: ee295a544c68c7e718ca1eb7b35dbe6a705b016130438bbff77aa865eba89c30
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, many of which point to what appears to be a link farm designed to host other PDFs. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body also contains the malicious URL, suggesting an attempt to lure users to a malicious site. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=modal+verbs+obligation+exercises+pdf+with+answers
    • http://files.hiredentalstaff.com/uploads/1/3/1/4/131437806/816324.pdf
    • http://rujexoji.maryqueenofireland.com/uploads/1/3/0/7/130776760/347da3525c76c0.pdf
    • http://files.sampsongigharbortherapy.com/uploads/1/3/1/4/131407106/rufasak.pdf
    • http://files.thenaturalway.shop/uploads/1/3/0/9/130969297/2ed928966a2.pdf
    • http://files.qm-upholstery.com/uploads/1/3/0/8/130814124/8203599.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/59468284532.pdf
    • https://cdn.shopify.com/s/files/1/0434/6871/8242/files/amazing_facts_prophecy_study_bible.pdf
    • https://cdn.shopify.com/s/files/1/0430/0632/8995/files/20642338584.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/bowomoneposuzikilugolowin.pdf
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/zunajevelosunaka.pdf
    • https://cdn.shopify.com/s/files/1/0430/7278/2489/files/71806140566.pdf
    • https://cdn.shopify.com/s/files/1/0435/1465/8980/files/52745172484.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5509/files/zuginerovizijadupuvutixip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32505595602.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0767/files/c_programming_notes_handwritten.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/javascript_is_array.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2675/files/koxabitisurobaleruded.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4663/files/92828113733.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_off00009931.bin
4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9931 2828 bytes
font_01_sfnt_off0000a32c.bin
8bb6afcf0f55b1937db4ff257b0d4f9e8143243b00156e8b51bc0c07054de2a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA32C 5784 bytes
font_02_sfnt_off0000b6f5.bin
e18be1914fd16166097a671869a09121a4e5aab24165b492ef76ae53c50ee117		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6F5 10120 bytes

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