Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aa49df6c414738b…

MALICIOUS

PDF

43.1 KB Created: 2020-08-20 13:43:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f275c0100d6d3c2257f10e625486a775 SHA-1: ea256f4160e5b4a884b66f1fe4e97dc070f0a8a0 SHA-256: 2aa49df6c414738b2340faa267f3314876b696bc6c9b032ecf3d5f533f659471
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The primary malicious URL is https://ttraff.cc/pify?keyword=lagu+salah+apa+aku+ilir7+cover, which likely leads to a phishing page or malware download. The document body itself is heavily obfuscated but contains references to the malicious URL and other PDF files hosted on Shopify. The ML classifier strongly indicated maliciousness.

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=lagu+salah+apa+aku+ilir7+cover
    • http://files.bearfootgypsysoapco.com/uploads/1/3/0/7/130739754/9056936.pdf
    • http://files.shoploveandadog.com/uploads/1/3/1/4/131437421/juponodekov_majonudorojidi_vufef_wonilel.pdf
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/xikazikigiduluzitisakovit.pdf
    • https://cdn.shopify.com/s/files/1/0434/4243/8310/files/jepakowawexapugut.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/jezof.pdf
    • https://cdn.shopify.com/s/files/1/0429/5353/9747/files/answer_sheet_1_100.pdf
    • https://cdn.shopify.com/s/files/1/0429/4751/0435/files/ansiedad_por_separacin_psicopatologa_evaluacin_y_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/pedizarojutizoponer.pdf
    • https://cdn.shopify.com/s/files/1/0431/0797/5330/files/sibedivisudofuru.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4829/files/55760798333.pdf
    • https://cdn.shopify.com/s/files/1/0431/0391/2098/files/52374047469.pdf
    • https://cdn.shopify.com/s/files/1/0434/1039/1207/files/2640955131.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049cc.bin
a2f467b6830c3973a588f3fe91e23e5ea5cb20468a1249269e90e6454e625398		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49CC 5036 bytes
font_01_sfnt_off00005b08.bin
1d241e3a0f6341a82af1a11c1570a2e6f7dc1f5f9a8315f90b2e576742935922		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B08 9712 bytes
font_02_sfnt_off00007c3b.bin
95f2a8319533f051e584a9e2aa38e8d42f7eb419abe795cf0dce2d6390e2c0a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3B 16204 bytes
font_03_sfnt_off0000916d.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x916D 4324 bytes

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