Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5273b410628603…

MALICIOUS

PDF

45.2 KB Created: 2020-07-28 06:08:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8fcc1661ebbfcd1a1cd083ad9910617 SHA-1: 5a76914a4bba0b7a77d967ed6d6ed2b0576e77b8 SHA-256: 7e5273b41062860311df6daef27cf98c733ef32eb7c938563ef2863ea6d71566
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector and a link farm. The primary malicious URL, 'https://ttraff.ru/pify?keyword=5.+10+guide+tennie+mid+gtx', is a known redirector. While no scripts were explicitly extracted, the nature of the embedded links and the ML classifier's high confidence suggest an attempt to lure users to malicious sites, likely 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.ru/pify?keyword=5.+10+guide+tennie+mid+gtx
    • http://files.jennysparrowworks.com/uploads/1/3/1/3/131383727/6258416.pdf
    • http://files.holmevalleyfairtrade.com/uploads/1/3/1/6/131606198/rubabolewi.pdf
    • http://files.malamathesea.com/uploads/1/3/0/7/130776478/jusedeme.pdf
    • http://files.cogcomlab.com/uploads/1/3/0/7/130739376/0430f70ddaab284.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3729/4754/files/7706024118.pdf
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/nagobikumi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9503/8877/files/35564116722.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/24457357385.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/38042076383.pdf
    • https://cdn.shopify.com/s/files/1/0433/6628/5462/files/45342715560.pdf
    • https://cdn.shopify.com/s/files/1/0437/9875/7538/files/gefowudakowamusozuje.pdf
    • https://cdn.shopify.com/s/files/1/0433/4170/9462/files/fumirosuwadositarovaxitid.pdf
    • https://cdn.shopify.com/s/files/1/0431/9795/6258/files/pebeseg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mupesoxozuwimufuvijolus.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/34917536202.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/14171168880.pdf
    • https://cdn.shopify.com/s/files/1/0437/5196/4830/files/55771443006.pdf
    • https://cdn.shopify.com/s/files/1/0436/6244/2661/files/13412504014.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006da9.bin
051d36f20247f953456ae5fdbdeda597d2ada4439416b640f4e50cc2dd3faa2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA9 4724 bytes
font_01_sfnt_off00007dad.bin
df4ddfee38d31ddead3a22c5124bd18962f3127a4f6e99ff4ea8ae3bc8b4a89a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAD 13316 bytes

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