Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fdf00a1f766083a…

MALICIOUS

PDF

54.0 KB Created: 2020-08-11 08:48:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e405cb681a3f339abecd8a85171b2a6e SHA-1: 2df9f265186a938fb901a5b6786a8ca2409fb830 SHA-256: 6fdf00a1f766083a8cc9e927d62f1df2c049d5203bc1fbff43720c85726dd53a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying a redirector link to 'https://ttraff.cc/pify?keyword=medical+tourism+malaysia+pdf'. This indicates the document is designed to lure users to malicious sites, likely for phishing or to download further malware. The ML classifier strongly supports the malicious nature of this PDF.

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=medical+tourism+malaysia+pdf
    • http://files.thecelestecollection.com/uploads/1/3/1/3/131384559/7091187.pdf
    • http://files.johnlockheating.com/uploads/1/3/2/6/132681517/pokesifuvofuna.pdf
    • http://files.annasunchoi.com/uploads/1/3/1/6/131637881/7380a6af3.pdf
    • http://files.theartfulyarn.com/uploads/1/3/0/8/130813630/lufujagajanuvu-dunetope-wafokajoju-nenavazip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/wodikatataridib.pdf
    • https://cdn.shopify.com/s/files/1/0437/6608/7838/files/wapezupi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/dobanenekinagutelaxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7240/5157/files/maxomisop.pdf
    • https://cdn.shopify.com/s/files/1/0435/4804/9572/files/love_after_love_poem.pdf
    • https://cdn.shopify.com/s/files/1/0431/1557/7504/files/zonarevofadez.pdf
    • https://cdn.shopify.com/s/files/1/0434/4093/0983/files/64358979033.pdf
    • https://cdn.shopify.com/s/files/1/0437/3820/2273/files/dofidakibowerajuru.pdf
    • https://cdn.shopify.com/s/files/1/0435/1528/1568/files/alguien_esta_mintiendo_karen_m._mcmanus.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/wibikederilexufezizatilar.pdf
    • https://cdn.shopify.com/s/files/1/0431/6797/3538/files/wiguzibivibozem.pdf
    • https://cdn.shopify.com/s/files/1/0432/0431/3247/files/cinco_facetime_party_snoozer.pdf
    • https://cdn.shopify.com/s/files/1/0436/2623/4009/files/reduce_size_acrobat_reader.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009496.bin
a3436c1a2a7786b7da788118f8be1c2396a77f71ebc8061e011d3477deb0e538		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9496 5408 bytes
font_01_sfnt_off0000a6ee.bin
8899026b937680a006e7df01a75231cff1453d6f63896cbf8c0684a5fbb5fa8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6EE 10472 bytes

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