Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8e1f108fc93a194…

MALICIOUS

PDF

39.5 KB Created: 2020-08-19 01:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7597b129c42c10f37de312833dd22bf SHA-1: fadd72295909b7669cef3296f858089b0015aba2 SHA-256: c8e1f108fc93a194a26f9a0a604284a7698ef49ce01d1848df8d85668ff215e0
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Sarkari naukri' and includes the malicious URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to improve SEO for malicious content, further supported by the PDF_SEO_LINK_FARM heuristic. No scripts were extracted from this sample.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=sarkari+naukri+ssc+mts+answer+key
    • http://files.fittalentmanagement.com/uploads/1/3/1/8/131871642/wajibuwe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0945/files/pululisizakifatezigemu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6802/3194/files/bugifemurukuferutolize.pdf
    • https://cdn.shopify.com/s/files/1/0432/9383/5432/files/63183072446.pdf
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/gerao_baby_boomers_x_y_z_caracteristicas.pdf
    • https://cdn.shopify.com/s/files/1/0428/3102/0198/files/zezebo.pdf
    • https://cdn.shopify.com/s/files/1/0436/0775/2861/files/kufipijafegumuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/2417/7576/files/wajexezavekirefovo.pdf
    • https://cdn.shopify.com/s/files/1/0436/0794/9475/files/brts_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/1289/8461/files/gopiwubag.pdf
    • https://cdn.shopify.com/s/files/1/0433/5730/7039/files/daredevil_season_1_episode_13.pdf
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/kigitopilorexitofem.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_off00005d27.bin
a40b1f99a648a8df617e85fe6e8275f811b9ed449561a7074d4c8450071b88f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D27 5276 bytes
font_01_sfnt_off00006f0d.bin
0203c3c66cb3d8892a2e2ba84031a7957bc269a990895e043e0f2f410b739df2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0D 10084 bytes

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