Malicious PDF — malware analysis report

Static analysis result for SHA-256 de174ebc8c2a3812…

MALICIOUS

PDF

32.2 KB Created: 2020-08-04 02:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a5de51906121b8fe8cde410bd59fc4a SHA-1: 323f56ca4d8da12e283180cd5a23e6b3a2e06a18 SHA-256: de174ebc8c2a3812a07f111b807d89bb07545fdf37e23acf4d7bb34de401bd57
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to a redirector service. The primary malicious URL identified is https://ttraff.com/pify?keyword=cambridge+igcse+ict+revision+guide+pdf, which is likely used to redirect the user to a malicious site. The document body, though partially corrupted, contains keywords suggesting an educational lure, likely to disguise the malicious intent of the embedded links.

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=cambridge+igcse+ict+revision+guide+pdf
    • http://files.eloconsortium.org/uploads/1/3/1/8/131857983/pawilopilifu-mitegezes.pdf
    • http://files.greenlabelhome.com/uploads/1/3/1/4/131406840/9590574.pdf
    • http://files.storyclothdatabase.org/uploads/1/3/0/8/130874593/xesixaki.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/52272009598.pdf
    • https://cdn.shopify.com/s/files/1/0438/9486/6088/files/zalav.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9959313526.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/arquitectura_renacentista_caracteristicas.pdf
    • https://cdn.shopify.com/s/files/1/0428/8197/4435/files/cambridge_english_unlimited_placement_test.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2339/files/vetevikovirenuve.pdf
    • https://cdn.shopify.com/s/files/1/0427/8868/3932/files/duwigogogetot.pdf
    • https://cdn.shopify.com/s/files/1/0433/4023/4902/files/nemabebipazuniwesojonam.pdf
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/lovikagupoferepuzo.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_off00004128.bin
cb7f545cf08dbfb080da7e83d92301e7b106d2deef160952b1c73c96df0f7985		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4128 5548 bytes
font_01_sfnt_off000053ed.bin
f14f21d2b939be401972bab411be3353e0503b64d5efd150f1770ca7a647677a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53ED 9536 bytes

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