Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb972aa8bd40196…

MALICIOUS

PDF

36.0 KB Created: 2020-08-21 00:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6933b42a9ab29d0fc4b462d4fa29e13 SHA-1: 5f5ae507d4b368b75d6ec0c799be8930e450591c SHA-256: 4eb972aa8bd40196f8ace1bed0c708ffca8308b799ab1926e6954a2cad1be287
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=cambridge+audio+dacmagic+plus+driver'. The document body, though heavily obfuscated, contains text related to 'Cambridge audio dacmagic plus driver', suggesting a lure to download a driver. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a phishing or malware distribution attempt. No scripts were extracted from this sample.

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.ru/pify?keyword=cambridge+audio+dacmagic+plus+driver
    • http://files.newbodyfitnessne.com/uploads/1/3/1/3/131380297/45a0aac225324e5.pdf
    • http://files.clockpartsplus.com/uploads/1/3/2/7/132740838/guxarisekagopojig.pdf
    • http://files.adamscountychristian.org/uploads/1/3/1/6/131636807/tatewetugozusif_vuted.pdf
    • https://cdn.shopify.com/s/files/1/0436/0303/4276/files/daguzuxorejaseraridiroru.pdf
    • https://cdn.shopify.com/s/files/1/0435/0381/2773/files/vitezerenojo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5381/7762/files/61602673604.pdf
    • https://cdn.shopify.com/s/files/1/0431/1869/0458/files/b._ed_question_paper_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4230/7239/files/atonia_uterina_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/1414/4675/files/34924895523.pdf
    • https://cdn.shopify.com/s/files/1/0436/9691/4586/files/22149191414.pdf
    • https://cdn.shopify.com/s/files/1/0430/2805/4169/files/wugegiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sozolomunegodufedawugiwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4831/2738/files/christian_theology_an_introduction.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/gexitebesofegizowupimifi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4329/9234/files/86894461197.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_off00004f4a.bin
9ae137b6d6cc564f37f63b623835c05f5af7f656263416731aac2c5b260be308		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F4A 5500 bytes
font_01_sfnt_off000061e8.bin
d21b21364c63b9dc406b3c1662a183ccb9d99670a5a1b7ca94c8541ebbe57fee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61E8 9780 bytes

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