Malicious PDF — malware analysis report

Static analysis result for SHA-256 9069ac9d7f0c69fa…

MALICIOUS

PDF

49.3 KB Created: 2020-08-26 13:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf54c7368c8e8f83371164ce20d241c3 SHA-1: 497455f38824c61bbd70d431f25d559d57f7dfc3 SHA-256: 9069ac9d7f0c69fa5976c3b103055bcdca3425fe54b181d0fe86785b7423a3ce
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded URLs, with a critical heuristic firing for a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=toshiba+satellite+e205+s1904'. Another critical heuristic identified a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and URLs, reinforcing the malicious intent.

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=toshiba+satellite+e205+s1904
    • http://fageg.ncwnavhda.org/uploads/1/3/1/3/131383629/bukekij_nujofif_fuzibazitapinos_kolubelojusaxox.pdf
    • http://pawuwez.cantonohiolandscaping.com/uploads/1/3/0/7/130776321/3998718.pdf
    • http://files.legacystrategy.com/uploads/1/3/2/8/132814465/9965883.pdf
    • http://files.ksonstruck.com/uploads/1/3/0/7/130739470/pizuxakekulekam.pdf
    • http://lusiposap.countrygirlcustoms.com/uploads/1/3/1/0/131070356/30264d69e29.pdf
    • https://cdn.shopify.com/s/files/1/0429/0412/5599/files/vojazipigavupudisajim.pdf
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/lademaxokositikireme.pdf
    • https://cdn.shopify.com/s/files/1/0432/8642/9861/files/fuwibejajuxag.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/http-_win._cpp_160.pdf
    • https://cdn.shopify.com/s/files/1/0428/9773/5843/files/78968335201.pdf
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/lededuvij.pdf
    • https://cdn.shopify.com/s/files/1/0448/1892/3686/files/latitajupuratopiwinofi.pdf
    • https://cdn.shopify.com/s/files/1/0448/1862/8765/files/holding_deposit_agreement_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/0723/7531/files/pevobo.pdf
    • https://cdn.shopify.com/s/files/1/0440/3894/6981/files/independent_examiners_report_2018_accruals.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007312.bin
60f6496962dc3b438139e3bae85ca6c7b962c71ed2c71a44a48e5511962d9658		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7312 5144 bytes
font_01_sfnt_off0000849c.bin
87a6ba6df347802c9a2ef9f5e85afeb454f129c006794fdf4e52811a893f5e5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x849C 11204 bytes
font_02_sfnt_off0000aa5d.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA5D 4324 bytes

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