Malicious PDF — malware analysis report

Static analysis result for SHA-256 fff92eea34a203b9…

MALICIOUS

PDF

43.5 KB Created: 2020-08-16 17:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f75051724c0382ea6e0424619bc2214 SHA-1: 55b19ce069bcba4094e39fc97cafbdd465c4e169 SHA-256: fff92eea34a203b9a83bccfd7f8c6c727531d07e1c2bf75015a6ee46113ffbf5
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body text, though heavily obfuscated, contains the string 'kpi template powerpoint' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector confirms the intent to lead users to harmful content.

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=kpi+template+powerpoint
    • http://faxilelep.anabellegrigorescu.com/uploads/1/3/1/6/131606552/vajud-kakukofadijokez-torukoposogofuk.pdf
    • http://files.merkconstruction.com/uploads/1/3/1/3/131381799/fb12e0c.pdf
    • http://semovu.foxydrummer.com/uploads/1/3/1/4/131452903/wodawazafe_jenugubitiv_zenarosul_roposid.pdf
    • http://files.nysmathregentsprep.com/uploads/1/3/0/7/130775232/jerurozufade-xujebef-jolibisib-xitokegupe.pdf
    • http://files.latavolamarche.com/uploads/1/3/1/3/131378780/taxaduwudikuwevoxij.pdf
    • https://cdn.shopify.com/s/files/1/0434/4299/5352/files/sowenoguga.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9166/files/rationale_zahlen_bungen_klasse_7.pdf
    • https://cdn.shopify.com/s/files/1/0428/5657/9228/files/sexeroboduxukuze.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/22729871768.pdf
    • https://cdn.shopify.com/s/files/1/0438/4666/4349/files/31572363333.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/malevolent_netflix_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/2240/8087/files/din_en_iso_527.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/bose_wave_radio_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/89093380097.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tedix.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/alter_ego_plus_b1_corriges.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/analytical_reasoning_aptitude_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/0081/4998/files/99895066593.pdf
    • https://cdn.shopify.com/s/files/1/0434/2838/0839/files/dirotogeb.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_off00006e12.bin
4358fd3a1ff42092a19c6c91cc378f174424b1cef5813dd5b209e010d9411a07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E12 4848 bytes
font_01_sfnt_off00007e89.bin
e33d2d9d55828f06576499a5a48a030d2663b929e3a514fe71442da52f4f6a9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E89 10060 bytes

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