Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e3b9e85caf627ef…

MALICIOUS

PDF

42.8 KB Created: 2020-08-19 02:47:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0cd2a3b0aaf74d411478d5dff7aae9fb SHA-1: 64aba42015c559c03215740fe3c7e23aea6b09b9 SHA-256: 8e3b9e85caf627ef9106d7b3142eb3de871f84862702d3227c388ea16ff51d43
152 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs. One URL, 'https://ttraff.com/pify?keyword=adaptive+icons+android+o', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text and references to the authoring application, suggesting it's not intended for user consumption but rather as a container for malicious links.

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.com/pify?keyword=adaptive+icons+android+o
    • http://files.tenoaks.co.uk/uploads/1/3/1/4/131482931/pekavunuxen.pdf
    • http://pawitani.bannerville.com/uploads/1/3/2/8/132814930/jixedaja-sukisejati.pdf
    • http://files.littlefurfriends.com/uploads/1/3/0/9/130969655/6399251.pdf
    • http://togemevu.destinationpod.co.uk/uploads/1/3/0/7/130740450/0825367f1ede5.pdf
    • http://veliwal.whitbybrooklinprobus.com/uploads/1/3/2/8/132814930/d5ba6a4ee9.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/john_deere_d170_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/72711271168.pdf
    • https://cdn.shopify.com/s/files/1/0437/6382/6840/files/51325673561.pdf
    • https://cdn.shopify.com/s/files/1/0435/5702/8001/files/dabunak.pdf
    • https://cdn.shopify.com/s/files/1/0428/3187/2166/files/zavigawixo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1895/1576/files/walmart_w2_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/pafonupowesijixezavu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/97777576557.pdf
    • https://cdn.shopify.com/s/files/1/0433/8135/8759/files/balma_film_song_ming.pdf
    • https://cdn.shopify.com/s/files/1/0438/4758/1856/files/3437574765.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/rugeluvilikobufarav.pdf
    • https://cdn.shopify.com/s/files/1/0437/1021/8391/files/nodowunozilawa.pdf
    • https://cdn.shopify.com/s/files/1/0435/0348/5092/files/51248324632.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_off00006963.bin
f0f81b16965f96d2087d76f2b5a5206a91d6368625f6f8be167774cb1a71efba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6963 5084 bytes
font_01_sfnt_off00007ab8.bin
de7cc49ad911680ca678abf912abc5a6f290a37cafcab6e1a5b315b1952c3159		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB8 10420 bytes

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