Malicious PDF — malware analysis report

Static analysis result for SHA-256 af16948bf75fb7ef…

MALICIOUS

PDF

47.8 KB Created: 2020-08-14 01:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99821c9003cefd4ca0469677eb770828 SHA-1: 285a69b5d49c2f42efd0a0be77aa84af07724e1b SHA-256: af16948bf75fb7efe45b2107fff59a5bcb27da47cace9ca371caff55c2ff014f
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body, though heavily obfuscated, contains references to URLs that are likely part of this link farm. The primary malicious URL identified is https://ttraff.com/pify?keyword=games+like+summertime+saga+for+android, which is a known redirector. The file's purpose appears to be to lure users into clicking these links, leading them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=games+like+summertime+saga+for+android
    • http://xufis.keystohopecounsellingservices.com/uploads/1/3/1/1/131164460/f7408.pdf
    • http://xigukuze.nakayamaus.com/uploads/1/3/2/7/132741099/645fa27.pdf
    • http://files.stoneycreekvillas.net/uploads/1/3/1/1/131164152/257dcc.pdf
    • http://files.roundaboutthevillages.co.uk/uploads/1/3/2/6/132680808/1811769.pdf
    • https://cdn.shopify.com/s/files/1/0436/9291/6891/files/92670922982.pdf
    • https://cdn.shopify.com/s/files/1/0435/7016/7967/files/cricut_explore_air_2_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4189/files/19194628871.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2805/files/vutifinomekuris.pdf
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/biochemistry_of_collagen.pdf
    • https://cdn.shopify.com/s/files/1/0433/6697/3598/files/39_clues_cahills_vs_vespers_book_3.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/applied_statistical_inference.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4336/files/wobiw.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/d3_drop_down_menu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dadimutixiwukigojubiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/64138242411.pdf
    • https://cdn.shopify.com/s/files/1/0434/7458/3709/files/ayurvedic_upay_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1782/1605/files/kizog.pdf
    • https://cdn.shopify.com/s/files/1/0432/6542/5570/files/25025161533.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66689816557.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_off00007cd4.bin
f953fc4ddfab14becbe4fa56279c1964712c7b1b53871c27a4baccee0c4ea03a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD4 5320 bytes
font_01_sfnt_off00008ee3.bin
3549a963aeb9a430d30c1f16b032d00c717c04c90bf38d235f89fe23151eae11
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE3 10088 bytes