Malicious PDF — malware analysis report

Static analysis result for SHA-256 45fa7b4e1f8311e5…

MALICIOUS

PDF

38.4 KB Created: 2020-08-16 20:33:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c848c465a00aa6fc8f881d6bb906d5cb SHA-1: 6262a679def45da8e5656c5cd5bc0dcc7f86659b SHA-256: 45fa7b4e1f8311e588495a543888836c474dd03307f9132781b9f5a2fad70f32
128 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, disguised with a lure related to 'student attendance management system android source code'. This indicates a phishing or social engineering attack aimed at tricking the user into visiting a potentially harmful site. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic to distribute the malicious URL.

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.com/pify?keyword=student+attendance+management+system+android+source+code
    • http://files.tankuanaw.com/uploads/1/3/0/8/130874543/6059444.pdf
    • https://cdn.shopify.com/s/files/1/0431/3874/4469/files/14340011926.pdf
    • https://cdn.shopify.com/s/files/1/0434/4351/9638/files/math_worksheets_bar_graphs_3rd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0450/6199/6694/files/tetum.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9176/files/856555789.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0933/files/74141208161.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0971/files/kakikamamikovazu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8258/0130/files/ripijimulalevipatun.pdf
    • https://cdn.shopify.com/s/files/1/0452/1882/4343/files/mesiwebikituzuxupojemolom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vofekofunore.pdf
    • https://cdn.shopify.com/s/files/1/0435/8042/4351/files/surface_area_and_volume_of_composite_figures.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/dawaboduzipebubezoveva.pdf
    • https://cdn.shopify.com/s/files/1/0435/9569/4239/files/clipsal_saturn_switches.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_off0000564b.bin
54ab4472bbdb911d0b7c81ed6f307ce47230b91882e6f86d1431d269538f050d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x564B 5432 bytes
font_01_sfnt_off000068a9.bin
c5af3c5ba980ecb8d6776fd32b63a4c65df731de0f371c5ad315616e454cc40a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68A9 10780 bytes

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