Malicious PDF — malware analysis report

Static analysis result for SHA-256 c34a4e2f670e0e97…

MALICIOUS

PDF

43.8 KB Created: 2020-08-11 12:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 644ad16403f94d93a8e135a970cf8af7 SHA-1: ed77e2466a253c992b50091dbb792b3013b3463d SHA-256: c34a4e2f670e0e97d488affb6f2604c094dfd086e8a66010c32312562ef3ef0b
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a malicious redirector link to 'ttraff.ru', suggesting an attempt to lead the user to a malicious site. The document body, though partially corrupted, contains text related to 'ejercicios de enlaces quimicos resueltos 4 eso pdf', likely a lure to make the document appear legitimate. The presence of numerous links, including a confirmed malicious redirector, strongly indicates a link-farming or phishing attack.

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=ejercicios+de+enlaces+quimicos+resueltos+4+eso+pdf
    • http://files.mylifeinchange.com/uploads/1/3/1/4/131482819/2880625.pdf
    • http://guzam.txroyaltyphotography.com/uploads/1/3/2/8/132816066/8938652.pdf
    • http://files.3djoes.com/uploads/1/3/1/6/131636725/mamebaramewe.pdf
    • http://files.virginialangum.com/uploads/1/3/0/7/130740524/tetegokitir_xenenopegam_sasanibajapufi_vijupamamapeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/pegumugedozuniv.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/logewugezexabij.pdf
    • https://cdn.shopify.com/s/files/1/0439/6145/0654/files/beej_socket_programming_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/1795/3702/files/65479170801.pdf
    • https://cdn.shopify.com/s/files/1/0434/9978/2309/files/conservacion_de_los_elementos_bioticos_y_abioticos.pdf
    • https://cdn.shopify.com/s/files/1/0434/5269/4680/files/62917269965.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/tutejaxodopotetizoras.pdf
    • https://cdn.shopify.com/s/files/1/0432/5706/9721/files/1447982542.pdf
    • https://cdn.shopify.com/s/files/1/0433/4993/4229/files/xilaburav.pdf
    • https://cdn.shopify.com/s/files/1/0441/1670/5432/files/peragimirojefezusub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuxevitilikibuvenimomabu.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_off00006693.bin
11e3bba16e3fea9eac4fc318333d2210eee5fe7c953cc15e14cfe9309118f9ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6693 5548 bytes
font_01_sfnt_off00007966.bin
49f55aab613acd9b61b4a72e121574fd4375c66f5d88249164b036c198c0f3f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7966 12016 bytes

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