Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a1be3fa95ae69ee…

MALICIOUS

PDF

65.4 KB Created: 2020-08-09 22:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12b4109d92bf9af117d90622bcd4a138 SHA-1: b943039ae1d9624ebeadd042a5ad4e0c0e56a8f0 SHA-256: 7a1be3fa95ae69ee05b10160ae94022b5dae70af0e5410e09abfceece7ca548f
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary malicious URL, 'https://ttraff.com/pify?keyword=statistical+demography+pdf', is flagged as a known malicious redirector. While no scripts were extracted, the sheer volume of links and the presence of a malicious redirector suggest an attempt to lure users to potentially harmful content, possibly for phishing or malware distribution.

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=statistical+demography+pdf
    • http://bajowolij.kaplanforschoolcommittee.com/uploads/1/3/1/6/131607062/09bdf0e38523c8.pdf
    • http://files.avalonweb.com/uploads/1/3/1/4/131454549/2b07967d65912b.pdf
    • http://livis.beforeitsgonejourney.com/uploads/1/3/1/6/131606227/vopem.pdf
    • http://files.arganolabs.com/uploads/1/3/0/7/130775978/durolubajaxamowemuva.pdf
    • http://files.jonnywilderness.com/uploads/1/3/1/4/131483154/lizowabizujozoxo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/96222614658.pdf
    • https://cdn.shopify.com/s/files/1/0433/4521/5637/files/44554846894.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/427561460.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8548/files/26593182342.pdf
    • https://cdn.shopify.com/s/files/1/0438/9175/3115/files/urdu_to_pashto_dictionary_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4767/3253/files/lonunube.pdf
    • https://cdn.shopify.com/s/files/1/0431/4755/9067/files/20932268833.pdf
    • https://cdn.shopify.com/s/files/1/0437/5147/3303/files/vobetida.pdf
    • https://cdn.shopify.com/s/files/1/0435/4893/4295/files/zexometo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/19363888432.pdf
    • https://cdn.shopify.com/s/files/1/0432/5684/0354/files/softwares_serial_keys.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0840/files/nixesememofimalejojud.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_off0000b364.bin
8f423d509c5b8bc3cbae44846dd44ae061279f7c31b6eeb0135a89c1a9dd866f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB364 5456 bytes
font_01_sfnt_off0000c5ea.bin
bbe3e29d9fa2bd62ec09d2774a4d0172ec3b4fb256526a0e968ec4fcb0cbe444		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5EA 10688 bytes
font_02_sfnt_off0000ea25.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA25 4324 bytes

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