Malicious PDF — malware analysis report

Static analysis result for SHA-256 42e3e67c5d7bb27b…

MALICIOUS

PDF

34.1 KB Created: 2020-08-23 21:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 603c0bf7c34ab4631eb175eb63fe0a32 SHA-1: 44b65661b6f867cade295d1576efcc4689017dd4 SHA-256: 42e3e67c5d7bb27b662dc59b2f421583ce5564a9d51bd2d0ca7ff83fc56463a4
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of embedded links, a technique often used for SEO link farms or to redirect users to malicious sites. One critical heuristic flagged a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=afaan+oromo+video'. While the document body contains garbled text and some URLs, the primary malicious intent appears to be the mass distribution of links, with the ttraff.ru URL being a strong indicator of malicious redirection.

Heuristics 3

  • 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.
  • 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=afaan+oromo+video
    • http://nizimu.jadsys.com/uploads/1/3/1/4/131455328/b14e1b808eb.pdf
    • http://files.usslitchfieldcounty.com/uploads/1/3/0/7/130776406/juwedogo-kuguso-narolenap.pdf
    • http://files.nealcm.com/uploads/1/3/1/4/131409526/mivitelelasu.pdf
    • http://bidobuxus.peterandpaulapixie.com/uploads/1/3/1/4/131454215/kuduj-lumataw-wenuxewud-bofixev.pdf
    • https://cdn.shopify.com/s/files/1/0440/7567/9896/files/male_and_female_reproductive_system_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/2566/0066/files/getuleroxivodagog.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/balancing_chemical_equations_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/5208/9000/files/58337187166.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57955619809.pdf
    • https://cdn.shopify.com/s/files/1/0454/4344/8990/files/lumbar_facet_joint_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0432/0319/9136/files/benefits_of_yoga_essay.pdf
    • https://cdn.shopify.com/s/files/1/0435/6099/2927/files/factoring_perfect_square_trinomials_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/59833471991.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1765/files/63527568693.pdf
    • https://cdn.shopify.com/s/files/1/0435/5919/0689/files/gazusupu.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_off000047a2.bin
872f5c33fef9e12ea497c0cde534b26861413b0f53f2e3fb2de3fcc48379e4e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47A2 4892 bytes
font_01_sfnt_off00005838.bin
c5e5d3cf5213665f6ab72067a7f05316532a43798868392fe6ff308e391f1b09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5838 10584 bytes

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