Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae90a14527efd32c…

MALICIOUS

PDF

85.5 KB Created: 2020-07-10 13:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e125f1ab1a04b29a132ffdaf98312d8c SHA-1: 9ee05f72d9b6babc8023087c04d78766d6ec92b9 SHA-256: ae90a14527efd32c4dcda1ac3b184c9e4d80141397c49b5527e2dd65c66fdbc1
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic search results, specifically for "Shiva puranam malayalam pdf download", and directs users to a known malicious redirector. The ML classifier strongly supports the malicious verdict. The embedded link `https://ttraff.cc/wb?keyword=shiva%20puranam%20malayalam%20pdf%20download` is the primary indicator of malicious intent, likely leading to further compromise.

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/wb?keyword=shiva%20puranam%20malayalam%20pdf%20download
    • http://files.ofmiceandmolecules.com/uploads/1/3/2/8/132814182/87684.pdf
    • http://files.whitepeacockcoffee.com/uploads/1/3/1/4/131436971/7dad80.pdf
    • http://files.thefilamentstudio.com/uploads/1/3/1/6/131606035/fakesijerisaz.pdf
    • http://files.w9bro.net/uploads/1/3/2/3/132303126/d2ab10b0.pdf
    • http://files.opunakesurflifesaving.com/uploads/1/3/0/8/130814513/gezitowejukejekojuko.pdf
    • http://files.oregondyslexiainstitute.com/uploads/1/3/1/3/131380397/muwezivamogi-wewodanasopok-lagolisusavemug.pdf
    • http://files.adelaidechickensittingservice.com/uploads/1/3/1/8/131857071/wovakemeluwo-bokevanukapaku.pdf
    • http://files.quantumpoint.org/uploads/1/3/0/8/130874031/fexurugomaseba_livorejalolokib_kuluvewowa.pdf
    • http://files.kununurramarkets.com/uploads/1/3/1/8/131856844/a074ed604a00fd.pdf
    • http://files.hawaiidisabilitylegal.com/uploads/1/3/0/8/130814630/2519408.pdf
    • http://files.peachstatecleaning.com/uploads/1/3/1/8/131871480/4363039.pdf
    • http://files.divorcecoachingandconsulting.com/uploads/1/3/0/8/130874518/bejam-soselovorifat-tekumubobup-powidonuvewadar.pdf
    • https://gosivev.files.wordpress.com/2020/06/gawatuxe.pdf
    • https://wuwiwil.files.wordpress.com/2020/06/sibotobaxe.pdf
    • https://kobuloki89011843.files.wordpress.com/2020/07/lifegusasij.pdf
    • https://nafevulaxa.files.wordpress.com/2020/06/pojitixamesenebibotit.pdf
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/lobuzegegamojum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93880590480.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42632515291.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_off000114aa.bin
c79859d36a6ce20f5b19cf58880049bf9f2db054b5a8ac47a2b4973df300367f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114AA 5144 bytes
font_01_sfnt_off00012603.bin
c684768a95cd60826b99db03dadf2da2861a3fd333d53d05289898271d579c22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12603 10008 bytes

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